Adds initial amulet integration tests for DB Validation, and website response

Hey Sebas & team,

Included are the amulet test(s) as promised. The larger dissection of what's here to follow.

`00-setup` - this is the precursor script that will be run in CI and anybody that attempts to execute `juju test` or `bundletester`. You need to setup pre-dependencies in this file such as python-requests, and amulet.

`10-deploy` - this is the actual integration test. The 3 methods contained there in are pretty well documented. Feel free to reach out if there is any confusion as to whats going on in here.

When I was writing the tests, its important to note that I referenced #25 to get the charm in 'working order' so I could execute `bundletester` against the tests. 

![selection_130](https://cloud.githubusercontent.com/assets/246944/4463762/05832578-48ce-11e4-9bc3-c969823392c9.png)

There are other issues at hand that need to be resolved in order for `bundletester` to take care of the heavy lifting, such as passing proof. If you've got the `charm-tools` package installed: `apt-get install charm-tools` you can get these cleaned up pretty quickly, and see what needs to be resolved by simply issuing `charm proof`