Stop hardcoding carrier for some regions (bug 1061716)

This was introduced in 2f67a828 to be more more DRY, but it was wrong in some cases: for instance, it meant your carrier was automatically set to 'deutsche_telekom' if you had an US SIM.

Also took the time to sort the 2 arrays by MCC.
Fix some wrong carriers/regions, add some carriers etc
Merge pull request #661 from diox/stop-hardcoding-carriers-to-regions

Stop hardcoding carrier for some regions (bug 1061716)
L10n Extract/compile script. Today's lucky number is 1008.
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Updated Polish translation
Merge pull request #682 from Witia1/master

Updated Polish translation
upgrade to bower/gulp system (bug 1072684)
Prepend media url to FxA CSS (bug 1074235)
Merge pull request #680 from mstriemer/pull-fxa-css-from-cdn-1074235

Prepend media url to FxA CSS (bug 1074235)
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 316 of 333 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 333 of 333 strings translated (0 fuzzy).
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Update messages.po
Merge pull request #683 from devaneymoz/patch-19

Update messages.po
Merge pull request #677 from ngokevin/bower

upgrade dependencies to pull from bower/gulp system (bug 1072684)
Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 333 of 333 strings translated (0 fuzzy).