WIP: Additional Specification Drafts 

Organizing the general structure and making a first pass at several additional specification documents modeled after W3C PROV.

- NIDM Overview: more or less a listing of specs
- NIDM Primer: high level overview of NIDM Components
- NIDM Descriptor: a mechanism to describe NI-DM documents (e.g., version, license, etc.)
- NIDM Experiment: a mechanism to describe raw datasets, typically from neuroimaging databases