started to patch up nem solver
Merge pull request #43 from briandrawert/threejstest

Threejstest
Merge branch 'nemfixes' into threejstest
zero padding for z-coodinate for true 2D meshes
Fixed a couple of JS errors
Display of meshes in Notebook now works. Added funtionality to center the exported mesh on origo for nicer plots
fixing JS
Conflicts resolved