Fixed some typos
Use version ranges rather than exact versions in setup.py

Libraries should never specify exact requirements because other versions might be needed by the project or its dependencies.
Merge pull request #201 from spookylukey/patch-1

Use version ranges rather than exact versions in setup.py - thanks Luke!
Merge branch 'master' into dev
Upgraded django-mptt to 0.6.1
Added support for django 1.7
Added removed contrib middleware in MIDDLEWARE_CLASSES
Upgraded django compressor to 1.4
Removed python 2.6 and django 1.4 and 1.5
Removed south and updated easy-thumbnails requirements
Removed django_extenstions from INSTALLED_APPS setting
Added python 2.6 and django 1.4 and 1.5 support
Reset of accidental changed testproject_db
Exclude python 2.6 for django 1.7.1 in .travis.yml
Updated README.md
Prefer get_queryset over get_query_set
Added django 1.7 to tox config; also updated tested django versions
Updated django version to 1.5.11 in travis config
Fixed test_used_on_pages_json
Removed ADMINS and MANAGERS from example settings to prevent Django 1.7 warnings