Fixes issue #1960. Account for right/top spine data offset on transform when doing spine.set_position(). Also includes a testcase for the data locations.
Improved comment for data spine transform adjustment - taken from mdboom.
Added bullet to api_changes documentation on PR #1964
Merge pull request #1964 from cimarronm/data_spine_right_top_location_fix

Fixes issue #1960. Account for right/top spine data offset on transform ...