Update already-existing languages from Transifex.
Add new translations from Transifex.

New languages:

et - Estonian
ca - Catalan
fo - Faroese
fr_CA - French (Canada)
hr_HR - Croatian (Croatia)
km - Khmer
ms_MY - Malay (Malaysia)
pt_BR - Portuguese (Brazil)
ro - Romanian
si_LK - Sinhala (Sri Lanka)
sk_SK - Slovak (Slovakia)
sl_SI - Slovenian (Slovenia)
sr - Serbian
th - Thai
uk - Ukrainian
zh_TW - Chinese (Taiwan)
[38degrees] Add comments
[500px.com] Add coverage/update
[500px.org] Add coverage
[500px.org] Enable
[AdBlock] Add support.getadblock.com
[Aftenposten] Add comments
[Aftenposten] Add exclusions, mark partial
[Aftenposten] Remove platform
[Bergens Tidende] Add comments, mark partial
[Bergens Tidende] Add exclusions
[Bergens Tidende] Enable
[Bergens Tidende] Add kundesenter, statisk
[Bergens Tidende] Rename
[Big Brother Watch] Add comment
[Big Brother Watch] Append tld
[bit.ly vanity domains] Invert exclusion

Oops.
[bit.ly vanity domains] Add a few more
[Change.org] Add/amend/prune comments, mark partial