local-metadata: new match for tv series

- Match season and episode with dots
e.g: season: 2, episode 05 is (..) 2.05

- Match title inside parentheses.

https://bugzilla.gnome.org/show_bug.cgi?id=732261
local-metadata: fix trailing whitespace on values

https://bugzilla.gnome.org/show_bug.cgi?id=732261
local-metadata: fix case sensitive blacklist words

https://bugzilla.gnome.org/show_bug.cgi?id=732261
local-metadata: check for updated title on tests

https://bugzilla.gnome.org/show_bug.cgi?id=732261
local-metadata: add test to new matching case.

https://bugzilla.gnome.org/show_bug.cgi?id=732261
Updated Galician translations
Updated Russian translation
dleyna: Do not use format constant

Make life easier for translators.

https://bugzilla.gnome.org/show_bug.cgi?id=732016