Add spanish and english translation support. Closes #4

* Add translation method to strings in templates.
* Add locale directory name in base settings.
* Add emtpy links to change language.
* Add available languages and change form
* Add ignore rule for compiled translation files.
* Add more content to translation files.
* Add locale middleware and djago-rosetta application.
* Change local cache config required by django-rosetta.
* Add rosetta URL configuration.
* Add translation for text.
* Add django-rosetta as base requirement.
* Remove fuzzy
* Updated PO using rosetta.
* Change locale path using SITE_ROOT + join().