[ffigen] Added wrapper over lookUpbindings, fixed merge conflicts, migrated code (#25)

Closes #10.

Moves the functions from toplevel to a class to facilitate being able to use the bindings more flexibly.

* Replaced config init-function-name with name and description.
* Handled name conflicts - Function-Function, Typedef - Function - Struct/Enum.
* Updated examples and clang_bindings, Updated tests.