Release Jelix 1.3.7
Bumped version to 1.3.8pre.SERIAL
Minify plugin: fixed a regression

introduced by commit 1b18453de27f89b85aba9904a488024799832270.
the list of excluded CSS or JS files was splitted on /, not on a comma.
bad copy-paste /o\
Merge branch 'jelix-1.3.x' into jelix-1.4.x

Conflicts:
	lib/jelix/VERSION
	lib/jelix/plugins/htmlresponse/minify/minify.htmlresponse.php
	testapp/VERSION