Django-google-adwords

- Updated README
- Fixed links to django-nose issues.

- Added tox support with tests for Python 2.7, 3.3, 3.4 and PyPy.
- Updated README.md to README.rst in preparation for pypi support.
- Added runtests.py script to run tests inside app.
- Moved repository from bitbucket to github.
- Removed random printing.
- PEP8 support (mostly...).
- Fixed issue that could occur with locking on memcache.
- Now using django-cereal for more efficient communication over the wire in Celery.
- Changed setting `GOOGLEADWORDS_START_FINISH_CELERY_QUEUE` to `GOOGLEADWORDS_HOUSEKEEPING_CELERY_QUEUE`.
- Removed `Alert.sync_alerts()`, `Alert.get_selector()` and task `sync_alerts` as the services that these functions call have been discontinued in the Google API. The :code:`Alert` model remains in place so that existing alerts can be accessed if required.

- Modified cache based locking mechanisms to improve speed.

- Ensured Account.QuerySet methods return data ordered by day.
- Added helper methods on Account for ad_groups and ads and Campaign for ads.

- Changed to use latest version of api

- Django 1.7 support
- Now using django-money instead of python-money (which looks to be no longer supported and doesn't work in Django 1.7 - thanks t3kn0s).
- Exception AdwordsDataInconsistency is now AdwordsDataInconsistencyError
- Currency is no longer a default on each model Money field, it's now derived from the returned data
- New settings GOOGLEADWORDS_CELERY_TIMELIMIT and GOOGLEADWORDS_CELERY_SOFTTIMELIMIT
- Updated README with requirements and installation instructions
- PEP8
- Replaced the use of the 'money' module with 'djmoney' since the python-money module hasn't been updated for >3 years. Replaced the hard-coded currency with a variable