Updated the documentation. Fixes #42

I did not add the documentation for the dataset_get, sandbox folders, as they seemed like prototypes.
I wasn't sure if I needed to add the testing and test folders, so I left them as is for now.
If you guys didn't know already, errors occur when running sphinx-build if we include show_examples.py, or show_binocular_greyscale_examples.py files which are in the script folder. Therefore I didn't include those files.
Fixes #42