Prettify success and error messages
Be consistent about where and how to display alert messages
Pass the same title to all templates
Improve readability of template code by:

- Reducing line length where sensible
- Making formatting more consistent
- Increasing vertical space between logical units (e.g. divs)
- Reordering elements in <head>
Add meta tag for enabling Bootstrap responsive features as explained
here: http://twitter.github.com/bootstrap/scaffolding.html#responsive
Add class and method-/function-level docstrings to non-test code
Add class and method-level docstrings to util_tests.py module and
update individual tests to conform to their docstrings
Make sure tests for utility functions use upload directory defined in settings.py
Add class and method-level docstrings to validator_tests.py module
ValidatorTest.__delete_uploaded_files is a class method, so change the
name of its first argument from 'self' to 'cls'
DRY: Put code that builds 'results' URL for ViewTest.test_analyse_view in separate method
Add class and method-level docstrings to view_tests.py module and
update individual tests to conform to their docstrings
Fix formatting in settings.py and validators.py: Keep lines to 78
characters or less
Fix formatting in validators.py: Remove space after opening
parenthesis of function call
Refactor: Make extension validator more generic
Remove obsolete comments from urls.py module
Add empty models.py to make sure Django does not complain about it
being missing when running the test suite
Merge pull request #12 from itsjeyd/master

Merged final cleanup commits: thank you very much, Tim!