Support for explicit 0= and 1= forms

Adds support for explicit 0= and 1= forms in javascript , PHP has the same https://gerrit.wikimedia.org/r/#/c/23943/
Added QUnits Test and used for loop instead of for..in because the latter can traverse unexpectedly over Array.prototype's enumarable methods
Merge branch 'patch-2' of https://github.com/darkyen/jquery.i18n into darkyen-patch-2

Conflicts:
	src/jquery.i18n.language.js
Support for explicit plural forms

Completing https://github.com/wikimedia/jquery.i18n/pull/24
Support for explicit plural forms

Completing https://github.com/wikimedia/jquery.i18n/pull/24
Merge branch 'darkyen-patch-2'

Conflicts:
	src/jquery.i18n.language.js
Merge pull request #39 from santhoshtr/master

Support for explicit plural forms