REST API Reference Guide update to reflect Service Requests as subcollection

- Supporting /api/service_templates/#/service_requests
- Supporting /api/service_templates/#/service_requests?expand=resources,request_tasks
- Supporting /api/service_requests/#/request_tasks (or tasks)
Updating REST API versioning to v1.0
Merge pull request #32 from abellotti/rest_api_guide_version_1_0

Rest api guide version 1.0
Moved from CFME Wiki

New automate domain export/import proposal moved.
Merge pull request #34 from mfeifer/movesfromcfmewiki

Moved from CFME Wiki
Add Cap and U Collection Explanation

Moved from old wiki.
Merge pull request #35 from mfeifer/movesfromcfmewiki

Add Cap and U Collection Explanation
Move Support of Open Stack Tenants Proposal

Moved from old wiki
Merge pull request #36 from mfeifer/movesfromcfmewiki

Move Support of Open Stack Tenants Proposal
Updates to the External Authentication guide

- Add instruction on enabling/disable via appliance UI and Console
- Extend manual configuration page to reflect changes needed
to support REST API/SOAP.