clean up Further Reading / Other Links sections

Add OpenNeuro.py and OpenNeuroCache class (#65)

* Add OpenNeuroCache class
* Allows to download and cache OpenNeuro data. 
* Download is specified by a set of entities such as dataset accession number, subject, session, run, task etc.
* Data can then be replayed through a BidsStream using the BidsInterface to test an analysis pipeline

Fix import in addLogin.py

Fix anonymization logic

DICOM anonymization was previously not working due to incorrect if
logic. This commit changes anonymization to work from a list of
attributes to remove, lowering possibility for error and increasing ease
of extension for future fields.

Add run-docker.sh helper script