Generation of inputs ad outputs parameters added.
Merge branch 'DUI-GenerateParametersForCustomNode' of https://github.com/vmoyseenko/Dynamo into
Merge branch 'DUI-TooltipForAddons' into DUI-GenerateParametersForCustomNode
TryToLoadXmlNode renamed into TryLoadDocumentation.
inputParameters and outputParameters now are generating in TryLoadDocumentation.
Merge pull request #189 from vmoyseenko/DUI-GenerateParametersForCustomNode

DUI: tooltip for addons. Part 2