Make paths in fx11-build.pro case sensitive
Drastically simplify release.pl.

Previously release.pl did complex parsing of .pro
files to figure out which files to include in the
tar ball.

This change removes this logic and instead performs
the minimal modifications needed under the assumption
of a clean tree and then uses system tools to create
the tar.gz and zip files.
Missed DIST dependency on mkini.sh results.
Adjust build error text (missing submodule dir)

* Adjust the error text of when the build notices a git submodule
for a third party library was not initialized.
The new text should be more precise and compact.
Merge remote-tracking branch 'upstream/master'