Add some more example comments to the DynamoNode sample.
MAGN-1036. Implement IComparable on units.
Update 0.6.3 documentation

Based on AU docs
updated SortBy to operate on IComparables
made SequenceToFSharpList an extension method
allow unplugged ports in perform all
allow passing functions to python scripts
Add tests for units comparison.
Merge branch 'master' of github.com:ikeough/Dynamo

Conflicts:
	src/DynamoPython/Converters.cs