Merge pull request #8 from bvssvni/master

Added .travis.yml
Added build status button

Closes https://github.com/PistonDevelopers/ai_behavior/issues/6
Use FloatMath - fixes recent nightly change #9
Merge pull request #10 from PistonDevelopers/9-use-floatmath

Use FloatMath - fixes recent nightly change #9
Added link to how to contribute

See PistonDevelopers/piston#715
Updating for enum namespacing
Updating tests for enum namespacing