Moved tests out of bravo, and into main tree.
tests is no longer a python package, just a standard directory.
Moved images into docs.
Added samples, this will be of use later on.
Initial refactoring towards bravo_core
Finished turning tests into directories, from python packages
Used relative imports instead of absolute imports.
Referred bravo -> bravo_core in python files.
Updated tests and fixed a bug introduced in refactoring.