Rentals agreements
Add links templates to rentals response
Reformatted all responses so they look consistent

when editing
updated seasons endpoint output
Merge pull request #14 from BookingSync/rentals-agreements

Rentals agreements
Merge pull request #17 from BookingSync/update-seasons-docs

updated seasons endpoint output
added docs for rates tables endpoint
fixed info about access by scopes for seasons and periods endpoints
Merge pull request #15 from BookingSync/rates-tables-endpoint

added docs for rates tables endpoint
Merge pull request #18 from BookingSync/scopes-fixes

fixed info about access by scopes for seasons and periods endpoints
added docs for rates rules endpoint