CGSGNodeTest : removes dimension from memory canvas which involved memory leaks on some browsers and devices and provide crossed-text feature.
CGSGNodeText : removes dimension from memory canvas which involved memory leaks on some browsers and devices and provide crossed-text feature.
Merge remote-tracking branch 'origin/WIP' into WIP
CGSGNode : added a threshold to use when detecting selection
Merge pull request #27 from gdrouet/WIP

CGSGNodeText enhancements