GET for availabilities

URL for a single resource: /api/2/availabilitys/<associate_id>
URL for a collection: <Not Applicable>

Permissions Required for the API Key: 
* Overall Admin Level = Admin
* Scheduling Role Privileges = Read (or Read/Write)

Filter Options for a collection (query string vars): 
* <Not Applicable>. Always uses 'start'=today, and returns info through the next 12 weeks

