Updated Brazilian Portuguese translation
Prepare 3.11.3
Updated Galician translations
Depend on PyGObject 3.11
Stop using GObject.threads_init()

Resolves a PyGTKDeprecationWarning
Always name arguments to GObject constructors

Resolves several PyGTKDeprecationWarnings
Fix copyright sign in about dialog

Seems like the escape sequences don't work in Python 3.
About dialog: update website
Updated Lithuanian translation
Updated Greek translation
Updated Spanish translation
Updated Czech translation
Updated Brazilian Portuguese translation
Updated Galician translations
configure.ac: specify all options to AC_INIT
configure.ac: guess a reasonable AC_PREREQ
Update Chinese simplified translation
Updated Norwegian bokmål translation
Updated FSF's address
Revert "Updated FSF's address"

This reverts commit d5ec067378fc7594c378a7e6755671e10e02b799.