Make catalog name and catalog accessor function name customizable

Hi,

the project I am currently working for requires the gettext catalog name and accessor function name to be customizable through configuration parameters in order to avoid coupling to the API of angular-gettext. What we like to do is something like this:

Grunt Config:

	nggettext_extract: {
		pot: {
			options: {
				markerName: 'translate',
				catalogMarkerName: 'i18nService',
				catalogAccessorName: 'getTranslation',
				catalogAccessorPluralName: 'getPluralTranslation'
			},
			files: {
				'po/template.pot': ['src/app/**/*.html', 'src/app/**/*.js']
			}
		}
	},
	nggettext_compile: {
		all: {
			options: {
				module: 'app',
				catalogMarkerName: 'i18nService',
				catalogAccessorName: 'setTranslations'
			},
			files: {
				'src/app/translations.js': ['po/*.po']
			}
		}
	}

AngularJS Code:

	angular.module("myApp").controller("helloController", function (i18nService) {
		var myString = i18nService.getTranslation("Hello");
		var myString2 = i18nService.getPluralTranslation(3, "Bird", "Birds");
	});

	
In order to get access to the translated strings in AngularJS we will create a wrapper around angular-gettext which simply forwards the calls to gettextCatalog.getString, gettextCatalog.getPlural, ...
Using this approach we are completely independent from the angular-gettext API and can even interchange our internationalisation provider if the need arises.

Thanks for checking my modifications and for your feedback!

Cheers Andi