Update Time documentation to better reflect current precision levels
Allow input/interaction/output with Quantities (closes #751)
Remove print statements left-over from testing
Add test cases, resolve some problems that appeared
Add tests for time/quantity interaction
Also define __rtruediv__ so python3 works correctly
Add documentation for interaction of Time and TimeDelta with Quantity
Correct documentation for unresolvable links to Quantity
Rewrite of value validation with try/except to avoid python3 problem
Merge pull request #1431 from mhvk/time-accept-quantity

Allow Time input/interaction/output with Quantities (closes #751)
Merge pull request #1536 from mhvk/time-delta-doc-precision-ok

Update Time documentation to better reflect current precision levels
Changed second Ring2DModel parameter to 'width'
More expicit exception messages
Removed unnecessary odd/even check in Trapezoid kernels
Added more tests.