Update authors list and identifier for the CodeMeta v3.0 release.

Add v3.0 to README.md

Add v3.0 to README.md

Update version in codemeta.json to v3.0

Update README.md with governance model

Add missing Type for reviewBody

Co-Authored-By: bandrow

- Update crosswalk CSV files to have equal number of rows, so the `scripts/aggregate.py` can properly generate every rows (73 rows) (currently it will produce only 70, omitting the last three properties)
  - Add [ readme, hasSourceCode, isSourceCodeOf ] properties to `Citation File Format 1.2.0.csv`
  - Remove all lines with only one comma at the end of CSVs

`SciCrunchRegistry.csv`
- Line 21-74: Remove Unicode Character 'NO-BREAK SPACE' (U+00A0)

`ISO_19115-1.csv`
- Line 1: Add missing 2nd column header name
- Line 23-24: Remove a leading space from the 2nd field
- Line 37: Change `role=`pointOfContact`` to `role='pointOfContact'` (use `'` instead of ```, to be consistent with other rows)

- Update URL and badge to use https://w3id.org/codemeta/3.0
- Also make Markdown style more consistent
  - Headings were mixed of === and ## --> Use only ##
  - Bullet lists were mixed of * and - --> Use only - (dash)
  - Strong text were mixed of ** and __ --> Use only __ (2 underscores)

describedBySource seems to be a reasonable equivalent to referencePublication

Add reference publication equivalent

Proposal per discussion in #347 (not finalize yet). In general:

- `develop` for vocabulary changes
- `master` for non-vocabulary changes

Resolves #347

bring Java/Maven crosswalk mapping to codemeta v3 and adjust some of the
original mappings to the Maven Project Object Model

https://maven.apache.org/pom.html

- codeRepository should point at the place where the human readable
uncompiled source code lives so `scm`
(https://maven.apache.org/pom.html#scm) is the right choice, not
repositories (https://maven.apache.org/pom.html#repositories)
- softwareRequirements is for the source code's dependencies
  (https://maven.apache.org/pom.html#dependencies), not the
  maven pom.xml's prerequisites
  (https://maven.apache.org/pom.html#prerequisites)
  one issue on dependencies is that Maven does transitive dependency
  management so the full set of dependencies is not resolved in this pom
  but would need to be programmatically generated (e.g.,
  `mvn dependency:tree` or `mvn dependency:list`)

(as a minor sidenote, this crosswalk CSV (and likely others) suffer from
crlf windows syndrome - see
https://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration#_core_autocrlf
for more details)

Co-authored-by: Daniel Garijo <[email protected]>
Co-authored-by: Val Lorentz <[email protected]>

- Add @ to those GitHub usernames without
- Add GitHub username text label to bare links
- Replace `http://` links with `https://`
- Fix broken links
- Remove extra spaces

See https://docs.italia.it/italia/developers-italia/publiccodeyml-en/en/master/schema.core.html#top-level-keys-and-sections