Update fr_FR.lang

Mining trad and others...
Update el_EL.lang
Update ru_RU.lang

some new entries
fileaccess: Add FA_BUFFERED_NO_PREFETCH

Make buffer not prefect anything at all.

This is good for low bitrate streaming services
icecast: Improve stream start time for icecast streams

Fixes #1939
settings: Don't crash on NULL optlist for multiopt setting

Fixes #1941
Merge pull request #159 from RuralHunter/master

zh_CN language update
Merge pull request #160 from pvc1/patch-12

Update ru_RU.lang
Merge pull request #158 from ananias47/patch-2

Update el_EL.lang
Merge pull request #153 from niconico27/patch-7

Update fr_FR.lang
Fix possible uninitialized var
icecast: Add some debug for stream metadata
Add support for TMPlayer subtitle format

Fixes #1892
Understand video/nsv mimetype
icecast: Clear streaminfo when we stop playing
strvec: Allow NULL strvec to be free'd (a NOP)
icecast: Add XSPF support

Fixes #1921
fa_video: Avoid division by zero

Fixes #1943
Don't crash if we fail to determine character encoding

Fixes #1947
Make control over tag parsing in subtitles more fine grained