Added interpolation methods to Catalog so that strings can be interpolated in JavaScript - e.g. $gettextCatalog.getInterpolatedString('Welcome {{name}}', { name: 'Andrew' });
Removed separate functions for interpolation and made getString and getPlural accept an optional context.  Unit tests updated and passing.
Merge branch 'master' of github.com:andywaite/angular-gettext

Conflicts:
	dist/angular-gettext.min.js