Updated README.md and checkbox icons
Update README.md
Refactored, cleaned up code, added debug info in release builds to allow debugging, removed redundant obj readers,

updated vtksuperquadricsource, added dragging to draw superquadric,
removed unused files, using smart pointers to state explicit ownership
Made changes.
Updated VTK to version 6.1, QT stays at 4.8.5,

and Carve CSG gets updated to January 14, 2014 repository,
(not using boost 1.55 since it breaks it, instead i'm
using the built-in ordered collection)
Updated README.md again
Merge branch 'master' into superquadrics
Fixed conflicts