V2 api

depends on https://github.com/OpenTreeOfLife/peyotl/pull/21

Added support for the studies/* calls in v2 of the API by delegating to v1 oti. This is not crucial if the oti v2 services are done.
The only advantage of bouncing these calls off of the new phylesystem-api is that we'd get to use
GET for those queries rather that POST. Not a big deal (but also should not be harmful to deploy even if apache proxy stuff is not directing any traffic to the phylesystem-api impl of those calls).

tests have been added to the ws-tests dir (as described in the TESTING.md file).