Pyramid

The pyramid branch is built on top of other branches, namely images and 547_SliderBric.

We really need these work @lbondaryk has been doing in the Pyramid branch to be merged into master.

Leslie and I have spent the last couple of days looking over the changes in the Pyramid branch.

While there is still code in image and imageviewer that I haven't given an in depth review, the code is working well enough now that I feel it can be merged into master, and future review can happen on the files there.

therefore I'm going to give this a :+1: and merge it.