Added List Sites endpoint.
Put example requests in code blocks with labels.
Added WeightLbs to Study Subjects response.
Added WeightLbs to Subject Details response.
Added Add Subject endpoint.
Added Edit Subject endpoint.
Added Subject Weight History endpoint.
Removed DownProjectedCounts from all endpoints.
Added AxisXCounts AxisYCounts AxisZCounts

And the WearFiltered counterparts where applicable.
Removed xyz from DOCS ONLY!

These fields will still be in the response.
Link to new Sites section from README.