tests & refactoring

[paulvollmer]

hello,
i have created some first tests and setup travis for continous integration.
also i've made some major changes at the generator stuff...
you can find the latest dev commit at the develop branch
i think we need to split the current implementation into src and bin packages
(and discuss the api definition or some other ideas?)

after that, the src/cli can be tested separately and the cli-tool imports the source like github.com/cratonica/2goarray.

also other tools can be easy import it as package

[cratonica]

I'm certainly happy to accept patches so long as it doesn't introduce breaking API changes. Feel free to submit a pull request when you think it is ready.

Thanks in advance for any such contribution!