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