Website for Bastion

[KPull]

At the moment, the URL http://bastion.rock takes you to Bastion's GitHub repository. We need some sort of website containing the first crucial pieces of information for someone planning on using Bastion for the first time. The website should be attractive and mobile-friendly. There should also be a link to the JavaDocs and to the GitHub repository. Also, the website should ideally be hosted through GitHub pages: therefore, it needs to be in a folder named /docs on the master branch.

[KPull]

Similar to #19: I think the Spring Framework project page, http://platform.spring.io/platform/, is a good starting point. It shows how to add the library as a depedency and what it does.