Compile pixelstruct

In order to compile pixelstruct. Here is how I did:

1. Download pixelstruct using SVN:  svn checkout http://pixelstruct.googlecode.com/svn/trunk/ pixelstruct-read-only
2. Install the library needed:  sudo apt-get install libqt4-dev libcgal-dev cmake
3. Go in src/glwidget.h and add the line: #include "GL/glut.h"
4. Remove the folder cmake as it contains an old script to find CGAL
5. Go in src/CMakeLists.txt and add the line: INCLUDE( ${CGAL_USE_FILE} )
6. Compile using make command