MNT : moved tests to metadataStore/tests

 - removed empty files
DOC : add mock + numpydoc
MNT : remove generated docs from version control
DOC : more documentation clean up

 - added more Mocked classes
 - removed un-used html file
 - cleaned up rst markup
 - don't blindly catch exceptions during DB connection
DOC : reformatted and corrected insert_event docs
MNT/DOC : factored and simplified create_event

 - moved key existence validation to helper function
 - made documentation match code
 - removed un-used imports
Merge pull request #40 from tacaswell/mnt_organization

Mnt organization [WIP]