Bump DocBlock version number
First commit for 1.2 and 2014: Backwards incompatible changes that introduce new supported file type checking on the factory and some streamlining in the interfaces.
Update branch-alias and version in the readme file.
Update travis to test PHP 5.5 as well and add MIT license file while we're at it.
Merge pull request #9 from timoschaefer/1.2

Merge branch '1.2'