Add several checks to prevent division by zero (triggered by converting black).
Merge pull request #37 from dwbullok/master

Add several checks to prevent division by zero (triggered by converting ...
Bumping version to 2.1.0
Update release_notes.rst
Fixed conversion from HSV -> IPT.
RGB conversion template was missing IPT target - added it.
Merge pull request #38 from dwbullok/master

Fixed conversion from HSV -> IPT.  RGB conversion template was missing IPT target - added it.