basic fixed to run the project in Django 1.5

Add one template to forms (basic) in project, https://github.com/avelino/django-mongoengine/commit/cc9a302ff550e19ecc0e425c498078d85d7079d1 and https://github.com/avelino/django-mongoengine/commit/6b3473f7b92ea09a7502b00c36572d40603827fa
If exist template `_forms.html` in extend project will be rewritten automatically