Bundle Logic

Finding the various directories in the bundle is done by first looking for a src directory in the same directory as the executable. This indicates that we are in a development tree. If this is found then we navigate upwards to the _SourceDir, which is the root of the tree.

If we are not in a development tree then check the environment variable CLASP_HOME. If it is set then use that for _SourceDir.

If _SourceDir has been set by one of the previous two methods then use the CLASP_DEV_yyy defines to locate the other directories. If _SourceDir has not been set then use the CLASP_INSTALL_yyy defines to locate all directories including _SourceDir.

Changes

• Remove _InstallDir and _ContentsDir as they are not needed in updated algorithm.
• Rename _LispSourceDir to _SysDir to match its logical host name.
• Add logical host STARTUP for extension startup load scripts so they can be installed in a different location then the binaries.
• Add CLASP_DEV_yyy and CLASP_INSTALL_yyy C macros so that location of the various directories can be controlled by waf or koga.
• Add bin-path, lib-path and share-path slots to koga.
• Add negated boolean options like --no-fu to koga.
• Require equal sign in koga string options.
• Fix koga regression test issues by allow various debug flags.
• core:lisp-implementation-id and core:clasp-git-full-commit only return
  non-NIL values if Clasp was built in a git working tree.

Fixes #175