Update British English translation
Updated Czech translation
Avoid C++ string conversion warnings

Change the type of string literals to const gchar * in
ET_File_Description.
Refactor Scan_Convert_P20_Into_Space()

https://bugzilla.gnome.org/show_bug.cgi?id=726108
Set default size on image properties dialogue

This gives a better result than setting a size request on the image
types tree view.
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
Move browser to EtBrowser object