Required changes to make Kdenlive work with some locales that have a comma (,) as...

Required changes to make Kdenlive work with some locales that have a comma (,) as numeric separator. Also now documents with a different locale will open as read only. Sadly this breaks the string freeze by introducing a new string and probably messing up some effects translation, since I changed the "paramlist" type to use ';' as separator instead of ','.

svn path=/trunk/kdenlive/; revision=5793