Use a default SLUG_ID value

otherwise the build fails using the Heroku beta
[builds api](https://gist.github.com/friism/c5df3e3e0091bbc6b9f2)
Add missing Makefile
Merge pull request #132 from dulaccc/fix-tests

Add missing Makefile
Added django 1.6 skeleton for testing
Added django 1.6 skeleton for testing
Added django 1.6 skeleton for testing
Added django 1.6 skeleton for testing
Update __init__.py
Added django 1.6 skeleton for testing
Added django 1.6 skeleton for testing
Added django 1.6 skeleton for testing
Updated Python to 3.4.0
Updated Requests to 2.2.1
Added simple runtime test for Python 2
Added simple runtime test for Python 2
Added simple runtime test for Pypy 2
Added simple runtime test for Pypy 2
Added simple runtime test for Pypy 2
Changed if len(history): to if history:
Added django 1.6, simple-runtime-P2, P3, and Pypy2