delete never used project_dir functionality

I found another package that does the same thing, but I can't remember
the name :( it was in some django settings guide.
Merge pull request #3 from crccheck/remove-project_dir

delete never used project_dir functionality
remove nose as a requirement for testing
add python 3.4 to list of supported versions
add coverage support
add coverage runner to tox
add travis-ci and coveralls integration
badges badges badges badges mushroom mushrrom
add support for wheels
add __version__ attribute
rename test module to something less generic
doc similarity to dj debug toolbar
doc env.get to try and sell it a little better
Merge pull request #5 from crccheck/testing

Modernize Testing
Merge remote-tracking branch 'origin/master' into sql-filter-fix