Reintegrated ipce branch with trunk. Summary of significant changes: ...

Reintegrated ipce branch with trunk.  Summary of significant changes:  Improved window tiling of cubeviewports(qview), ipce memory improvements, open/create new project, ImageFileListWidget now associated with Footprint2DView, importing from project tree, editing project tree nodes, selecting new active control net, colorize current edit control point on all views, save measure/save point improvements, shortcuts added for control point editor.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@8008 41f8697f-d340-4b68-9986-7bafba869bb8