Wiki: Re-organize wiki to support releases

[callahantiff]

Task:

• Overhaul (minor) existing organization of mapping content to enable better documentation and tracking of releases.

How:

• [x] Add wiki tab for releases and add new entries for v1.01 and v2.0
• [x] Take current content from the Conditions, Medications, and Measurements sub-pages and split it by release into it's appropriate pages

New for v2.0:

• [x] Describe new ontologies added
• [x] Incorporation of existing Loinc2HPO mappings
• [x] Alignment and subsumption of Juan's OHDSIananke mapping method
• [x] Better leveraging of OMOP concept hierarchies

[callahantiff]

Also would be helpful to add download links via Zenodo to frozen versions of the processed ontologies so people don't have to re-download and process them to use the code.

[callahantiff]

We have a workflow/Figure 1 now, woo!

[callahantiff]

@mgkahn - I think I made all of the requested changes. Does this look OK to you now (click on figure to enlarge)?

[callahantiff]

In Progress -- done enough to close this.