### What is this PR for?

This PR is for making docker images for zeppelin releases. It contains a script for building image for each release. Another script is used for publishing images to zeppelin Dockerhub account.

This repo, https://github.com/mfelgamal/zeppelin-dockers, is a demonstration of this PR. It contains zeppelin-base image and an image for each zeppelin release.
### What type of PR is it?

[Feature]
### Todos
- Review Comments
- Documentation
### What is the Jira issue?

https://issues.apache.org/jira/browse/ZEPPELIN-1386
### How should this be tested?
- run create_release script or publish_release script.
### Screenshots (if appropriate)
### Questions:
- Does the licenses files need update? no
- Is there breaking changes for older versions? no
- Does this needs documentation? yes

Author: mahmoudelgamal <[email protected]>
Author: mfelgamal <[email protected]>
Author: Mahmoud Elgamal <[email protected]>
Author: 1ambda <[email protected]>

Closes apache#1538 from mfelgamal/zeppelin-dockers and squashes the following commits:

cc8493f [Mahmoud Elgamal] Merge pull request #3 from 1ambda/fix/remove-startzeppelinsh
d48ecef [1ambda] fix: Remove start-zeppelin.sh
b64c680 [mahmoudelgamal] Remove gcc and g++ for decreasing the size
1f093d4 [mahmoudelgamal] Add script start-zeppelin to zeppelin-base
d2c744e [mahmoudelgamal] add scala to zeppelin-base
fd23970 [mahmoudelgamal] remove bash erorr message.
e1d4b77 [mahmoudelgamal] add R and python to zeppelin-base
e731cb4 [mahmoudelgamal] Add java-cacerts to zeppelin-base
e642309 [mahmoudelgamal] Add documentation and some modifications
231a414 [mahmoudelgamal] Add zeppelin-base image
ac06f3a [mahmoudelgamal] Make docker image for zeppelin release
48d0a01 [mfelgamal] Merge pull request #1 from apache/master

### What is this PR for?
This PR fixes the issue of newlines and tabs breaking results in the SQL interpreter in Livy.

The Livy interpreter will return incorrect results if a row contains \n or \t characters.
In the case of the newline, the result will be:
Line is missing from results if the \n appears anywhere but the end of a cell
`String index out of range: 17` if it appears at the end of a cell
In the case of the tab, the result will be misaligned columns if the tab appears in the middle of a cell
The output showing these error is attached to the Jira.

I have changed the parsing and any newline or tab characters will be escaped

### What type of PR is it?
Bug Fix

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-3098

### How should this be tested?
Unittests have been added

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Alex Bush <[email protected]>
Author: Alex Bush <[email protected]>

Closes apache#2701 from bushnoh/zeppelin-3098 and squashes the following commits:

9f2f6e3 [Alex Bush] Merge pull request #3 from apache/master
14e120d [Alex Bush] Merge pull request #2 from apache/master
46981fd [Alex Bush] Merge pull request #1 from apache/master
ee5a41b [Alex Bush] Merge remote-tracking branch 'upstream/master'
67a93b5 [Alex Bush] Merge branch 'master' of https://github.com/bushnoh/zeppelin
31cdbdc [Alex Bush] Added another comment explaining the regexp change
d054af0 [Alex Bush] Force a dummy change for Travis
64a42be [Alex Bush] Fix for newline and tab in data

…Spark Interpreter Scala REPL and fix the CI failure due to low Scala version

### What is this PR for?
- fix the [CI failure](https://travis-ci.org/github/apache/zeppelin/builds/709913046) due to [PR-3852](apache#3852)

### What type of PR is it?
[Bug Fix]

### Todos
* [ ] - Task

### What is the Jira issue?
* [ZEPPELIN-4962](https://issues.apache.org/jira/projects/ZEPPELIN/issues/ZEPPELIN-4962)

### How should this be tested?
* CI test

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? NO
* Is there breaking changes for older versions? NO
* Does this needs documentation? Yes

Author: xiejiajun <[email protected]>
Author: xie-jia-jun <[email protected]>
Author: JakeXie <[email protected]>

Closes apache#3860 from xiejiajun/ZEPPELIN-4962 and squashes the following commits:

9128c9b [JakeXie] spark.repl.target docs update
ad4c0e3 [xiejiajun] Clear irrelevant code
a12d3a9 [xiejiajun] Support for manually specifying the Java version of Spark Interpreter Scala REPL and fix the CI failure due to low Scala version
ab2b191 [xiejiajun] Merge branch 'master' of https://github.com/apache/zeppelin into apache-master
5569788 [xiejiajun] Merge branch 'master' of https://github.com/apache/zeppelin into apache-master
0a9af6c [xiejiajun] Merge branch 'master' of https://github.com/apache/zeppelin into apache-master
be36b37 [xiejiajun] 合并Apache Master分支冲突解决
1335d55 [xiejiajun] Merge remote-tracking branch 'origin/master'
fc59f57 [JakeXie] Merge pull request #4 from apache/master
9cc70fe [xiejiajun] Merge remote-tracking branch 'origin/master'
6ef9b23 [xie-jia-jun] Merge pull request #3 from apache/master
45af87a [xiejiajun] added timeout for getting Thrift client to avoid situations where the interpreter may not be restarted when the interpreter process exits unexpectedly
f149c3b [xie-jia-jun] Merge pull request #1 from apache/master
5d4b645 [xie-jia-jun] Support OSSConfigStorage of Aliyun
dbb6639 [xie-jia-jun] Add Aliyun OSS SDK
bb47849 [xie-jia-jun] Support S3ConfigStorage of AWS

### What is this PR for?
This Good Practice Guide will focus on how to write a controller following the controller as vm concept, and how to provide a nice separation of the code.

### What type of PR is it?
Documentation

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-1462

### How should this be tested?
Check the `.md` file, or build the website to see the full rendering

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Damien CORNEAU <[email protected]>

Closes apache#1443 from corneadoug/ZEPPELIN-1462 and squashes the following commits:

2dc04e0 [Damien CORNEAU] Address feedbacks
a4a2645 [Damien CORNEAU] Add the new Practive Guide Page