Merge pull request #5 from bvssvni/master

Added dependency graph to README
Added Travis CI support
Fixes #3
Merge pull request #6 from leonkunert/master

Added Travis CI support
Fixes build errors

Closes #7
Merge pull request #8 from leonkunert/master

Fixes build errors
Added link to how to contribute

See PistonDevelopers/piston#715
Fixed enum namespace changes

Closes https://github.com/PistonDevelopers/texture-packer/issues/11