atril/makepot, branch v1.21.0

atril/makepot, branch v1.21.0 MATE document viewer tx: add makepot 2018-03-15T17:20:01+00:00 raveit65 mate@raveit.de 2018-03-15T17:20:01+00:00 a3ade9fd0cea1bb4a6d0c00cf89ffc546093683a and move libmatemixer.pot to srcdir

and move libmatemixer.pot to srcdir