Drop in AdminLTE theme and plugins for django-xadmin

Based on:

• https://github.com/sshwsfc/django-xadmin
• https://github.com/almasaeed2010/AdminLTE
• Django 1.8
• Django crispy forms 1.5.2

1. Copy the xadminlte app to your django project
2. Download AdminLTE and extract it to 'static/xadminlte' (or update the links in base.html)
3. Download fontawesome, extract it to 'static/xadminlte/plugins/fontawesome-x.x.x', and update version numbers in xadminlte/vendors.py
4. Include 'xadminlte' in your installed apps before 'xadmin'