Added the wireframe view type

It shouldn't use line strips, it should use lines, and in fact line
strips should probably use lines to avoid the restarts even at the
cost of some extra indices. Still - wireframe display now available
too!

Change-Id: I0d87d8238fc4d82b06004034a7e278ea7ca23ade
Merge branch 'wireframe'

Change-Id: I0c0393c8dccc9d42a29070a0bee8acf3bc834cf8