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internal study fetch returning SHA

GET still returns just the content, to avoid
breaking client code, but it will be easy
to add the SHA to the returned JSON to
address:
  https://github.com/OpenTreeOfLife/api.opentreeoflife.org/issues/59
Removing tests that have moved to peyotl.
Remove myself from notifications
Fix of issue #56

master is checked out before GETs.
Merge branch 'translatingnexson' of github.com:OpenTreeOfLife/api.opentreeoflife.org into translatingnexson
fixed merge conflict
added study indexing module
Merge remote-tracking branch 'origin/multi-repo' into multi-repo
fixed merge conflict