Added dialog UI to change bakcground settings
Integrated background dialog ui
Finished interface for background gradient change in dialog
Color selection working
Fixed minor compile errors

- Chaged Eigen include path in 'SearchTreeNabo.tcc'
- Added Nabo to linking in CMakeLists.txt for lvr_viewer
First working reconstruct under Windows. Currently only with STANN. VS Project has to be tweaked manually.
Fixed some cmake issues to create valid VS projects
LVR viewer now compiling and working
Updated CMakeLists.txt files for all tools
Fixed some Warnings
Fixed compilation on LINUX
OpenCV compiler fixes - removed highgui stuff
Fixed compilation
Windows version compiling and linking fine against boost 1.56
Succesfull merge of all new features
Removed remaining Highgui code