Auto point picking works with mesh triangles

Works if point cloud are invisible (not marked in tree).
If cloud is visible - works as before.
Bug fix in OBJ I/O filter (CC would refuse to read a file using a material without defining texture coordinates)
changes for having sleep working with gcc2.7
'Ransac Shape Detection' plugin (qRansac_SD) enhanced:
	* proper handling of cone and torus primitives (display in 3D, etc.)
	* the expected primitive types can now be selected (with checkboxes)
Manual transformation tool enhanced:
	* user can constrain rotation around a given axis and translation along custom dimension(s)
Merge remote-tracking branch 'origin/master'
Minor changes, TODO list updated
Merge pull request #38 from eimix/master

Auto point picking works with mesh triangles
Massive code cleanup (old SVN tags, deprecated 64 bits file support methods etc.)
New menu entry: "Toggle materials/textures" (recursive)
Command line options for ccViewer ('-top' and '-win')