added new class vmtksurfacearraysmoothing.py
vmtksurfacearraysmoothing.py: added ScriptDoc
vmtksurfacearraysmoothing: added relaxation factor
vmtksurfacearraysmoothing: added iterations
Merge pull request #129 from ElenaFagg/meshtools

Meshtools
added new loopextraction and clip with loop
Merge pull request #131 from ElenaFagg/meshtools

added new loopextraction and clip with loop