Add tox test and vagrant confluence instance

[ytjohn]

Provides the following:

• Vagrant instance that provides a live confluence server.
• API testing against the same (partially resolves #2)
• tox to manage tests and test environments
• Makefile to standardize on interface.
• Added documentation for testing.

I wrote a handful of tests. It's only covers a portion of the API calls, but should provide a basis for adding more tests. Tests are executed in the order they appear within the file.

I did not add a make release/make build command to the Makefile as I wasn't sure of your build process for pip (and I wouldn't really be able to evaluate it either). You may consider looking at how flask does their make-release script, which is called by make release.

[rpcope1]

Very cool! I am going to look through these commits soon...I think I can certainly help write some tests as well.