Add common set of JavaScript libraries

Change-Id: I8aeee79d5e1cf79e0140cf7ab65d5434e04d872e
Update vtkWeb loader to reference additional libraries

Change-Id: If76f26ddc87b4474b2679eb42b1bf9751b8d1593
Merge topic 'vtkweb-add-widget-libraries' into master

70690d5e Update vtkWeb loader to reference additional libraries
d07dbf5a Add common set of JavaScript libraries