Merge pull request #116 from hstehling/master

rhinoscript/PullCurve now also working for polycurves
Added BlockStatus function
Fix bug in SplitDisjoint mesh
Fix coercecurve function call
Added RenameLayer. Fixes #115
Fix bug in AddPlanarSrf. Fixes #117
Added tolerance parameters to UnrollSurface. Use document settings if no tolerance provided. Fixes #120
Updated BlockDescription function to Fix #119
added plug-in functions
DimStyleOffset was adjusting wrong property. Fixes #121
Added ExtrudeSurface function . Fixes #3
LineClosestPoint was not testing against an infinite line. Fixes #60
AddNetworkSrf function added. Fixes #69