Updated Czech translation
Avoid crash when saving Ogg file with cover art

https://bugzilla.gnome.org/show_bug.cgi?id=729443
Fix memory leak when reading Ogg disc number field
Added Greek translation of help
Refactor libid3tag_Get_Frame_Str() and fix leak
Update ID3v1 genre list

https://bugzilla.gnome.org/show_bug.cgi?id=729036
Read extended Winamp 5.6 genres stored as integers

As libid3tag has not been updated in some time, the genre list is rather
out of date. If an integer genre is found, and libid3tag does not find
it in the index, try the EasyTAG index as a fallback.
Move main window to EtApplicationWindow object
Pass the main window to actions as user data
Move log area to EtLogArea object
Move playlist window to EtPlaylistDialog object
Move load filenames dialog to EtLoadFilesDialog
Move file search dialog to EtSearchDialog object
Move preferences dialog to EtPreferencesDialog
Move CDDB dialog to EtCDDBDialog object
Move scan dialog to EtScanDialog object
Replace strncat() with g_string_append()
Move select and unselect actions to main window
Move file selection actions to EtApplicationWindow
Set a rough initial window size and pane positions