Update .gitignore for local development
Remove empty .gitmodules file
Fix IntelliJ inspection warnings in django-backup

* Mutable default argument (list)
* name shadowing
Use Pillow in favor of PIL

pip >= 1.5 whines about PIL and the latest sorl-thumbnail supports Pillow.
Fix IntelliJ warnings in profiler helper

* Fully qualify the import of settings
* Catch the specific exception of NameError on setting access
Rename lifestream permalink view arg from id

The name id shadows a python builtin.
Fix IntelliJ warnings in settings.py
models.py: Convert to string format syntax and add strftime formatting to file fields