Initial impl

This InputFormat allows decoupling the format of the data from the actual jobs. It implement isolation from classloader and configuration perspective.
It is intended as a better MultiInputFormat which allows reading a single input from multiple locations with different inputformats coming from separate isolated class loaders (child first class loading delegation) and configurations.

There are a lot of things I miss.
Including could IDE integration.
also there's map in java 8 ;)