Correct the Saxon access and the packages path filtering

https://github.com/eXist-db/exist/issues/385
Revert "Correct the Saxon access and the packages path filtering"

Seems that finishing feature does not allow to publish them as feature

This reverts commit d2c0e4e649b75abeeba9211a94461030ab5588cf.
https://github.com/eXist-db/exist/issues/385

Warning suppression:
The obsolete usage of xslt style location has been updated.
The new location is relative to the project. The subdirectory
installer has been inserted before the install.xsl style.

Failing building:
The Saxon factory has been added to force Saxon usage and acces to the tokenize function.

Failing building:
The processing of xar are failing due to Linux dependent usage of file separators
Merge branch 'feature/WindowsBuildCorrection' into develop