Add __getitem__ to Time
Update to keep jd1,jd2 as arrays, check/set is_scalar, and also slice
the two _delta's
Further tweaks to __getitem__, making error message clearer and order better
Tests and documentation update
Correction to documentation
Add example also to "getting started" part of documentation
Add special case for instiating from list of Time objects, circumventing
call to _make_1d_array that could not deal with new __getitem__
PEP8 changes
Previous unsaved PEP change.  Darn.
Merge pull request #1132 from mhvk/time-getitem

Add __getitem__ to Time