Fix compiler warnings
Merge pull request #85 from asmaloney/compile_fixes

Fix compiler warnings
New Kd-tree structure added (work in progress)
Various typo and small code upgrades
Various typo and small code upgrades
Typo fix for compilation with gcc
Issue #86 fixed (misplaced camera after rotation center is picked)
Issue #86 fixed (misplaced camera after rotation center is picked)
ccViewer upgraded
ccViewer upgraded
qhull moved to 'contrib' + qHPR updated
qHull management reverted to previous state (in fact, qHull is so crappy that it should be replaced by a true C++ lib...)
New behavior for qHPR (it creates a new cloud each time instead of messing with the points' visibility)
Various code updates
Various code updates
throw() omitted in cpp file
Missing template parameter