Finish the transition to unicode of the kmap machinery and enable kmap files

Finish the transition to unicode of the kmap machinery and enable kmap files
again (bug 3304)

	* src/intl.C
	(Intl::initKeyMapper): Don't set the char set of trans anymore

	* src/chset.[Ch]: delete, no longer needed

	* lib/kbd/*.cdef: ditto

	* src/lyxrc.[Ch]: remove RC_SCREEN_FONT_ENCODING and font_norm,
	these are no longer needed

	* src/lyxfunc.C: adapt to lyxrc changes

	* src/Makefile.am: remove deleted files

	* lib/Makefile.am: ditto

	* development/scons/scons_manifest.py: ditto

	* src/text3.C
	(LyXText::dispatch): reenable the kmap mechanism

	* src/trans_mgr.[Ch]
	(TransManager::setCharset): remove, no longer needed
	(TransManager::insert): remove, since it would be identical to
	insertVerbatim now
	(TransManager::insertVerbatim): rename to insert

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17665 a592a061-630c-0410-9148-cb99ea01b6c8