Upgrade Django to version 1.7

	*  requirements.txt: Update Django to version 1.7.

Signed-off-by: Cristian Peraferrer <corellian.c@gmail.com>
recipes: Add the initial migration

	*  recipes/migrations/0001_initial.py:
	*  recipes/migrations/__init__.py: New files.

Signed-off-by: Cristian Peraferrer <corellian.c@gmail.com>
recipes: Add the bare minimum admin class for Recipe

	*  recipes/admin.py: New file.

Signed-off-by: Cristian Peraferrer <corellian.c@gmail.com>