Merge branch 'develop'
Removed 'vendors' directory
Added Travis-CI status image.
Fixed setup.py script
Refactored tests to rely on PYTHONPATH and external testutils packge
Added/Refactored Makefile to make testing / code coverage calculations easier
Removed comments; Removed .tox from coverage reporting
Fixed MANIFEST.in and setup.py to install package correctly
Moved tox requirements to *requirements.txt files
Fixed .travis.yml
Updated required version of PyPromise to 1.1.1
Changed way Travis executes tests
Changed default hostname for vagrant machine to 'pygrapes'
Fixed .travis.yml
Updated .travis.yml to run specific tox env within python virtualenv
Removed excessive command from tox configuration
Bumped PyPromise version to 1.1.2