Save JWT in localStorage for FxA auth (bug 1082165)

Fixes #145
Don't save `null` to sessionStorage for JWT
Commit from Mozilla Verbatim by user umesh007.: 72 of 72 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user umesh007.: 72 of 72 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/spartacus
Commit from Mozilla Verbatim by user umesh007.: 72 of 72 strings translated (0 fuzzy).
Look at logged_in_user for FxA (bug 1082151)
Merge pull request #147 from muffinresearch/fix-fxa-logged-in-check

Look at logged_in_user for FxA (bug 1082151)
Improve faking of logged-in-user
Merge pull request #149 from muffinresearch/fix-flakey-test

Improve faking of logged-in-user
Set user_hash -> false for implied login (bug 1087929)
Merge pull request #150 from muffinresearch/fix-1087929

Set user_hash -> false for implied login (bug 1087929)
Fix raciness in sinon setup
Merge pull request #151 from muffinresearch/fix-raciness-around-sinon-setup

Fix raciness in sinon setup
Do a reverification for FxA PIN reset (bug 1085773)

Fixes #148
URL encode the email in the querystring (bug 1088662)
Merge pull request #152 from muffinresearch/fix-email-encoding

URL encode the email in the querystring (bug 1088662)
Script conversion from Serbian Cyrillic to Latin (20141027)
Commit from Mozilla Verbatim by user ouesten.: 72 of 72 strings translated (0 fuzzy).
Merge pull request #154 from flodolo/20141027

Update sr-Latn using sr (Cyrillic) content converted with icu4c