MyTube: add Latvian translation, update MyTube.pot

Signed-off-by: Mirakels <mirakels@users.sourceforge.net>
cleanup: Remove movielistpreview, genuinedreambox and serienfilm files

Never built so no need to keep the source.
Fix imbd plugin, thanks to Happysat
Remove genuinedreambox files

Never built, so no need
MyTube: fix Latvian translation

Signed-off-by: Mirakels <mirakels@openpli.org>
Merge remote-tracking branch 'pli/master'

Conflicts:
	autotimer/src/WebComponents/__init__.py
	movielistpreview/CONTROL/control
	mytube/po/lv.po
	osdadjustment/Makefile.am
	serienfilm/CONTROL/control
	serienfilm/src/MovieList.py