Fix GCC build error.
COctreePointRenderer fix build
Generate MRPTConfig-version.cmake
More geometry unit tests
build_PTG_collision_grids(): simplified and more accurate

Leave only one build_PTG_collision_grids() function.
Slighly slower but more accurate and conservative (safer) computation of
collision grids for PTGs.
New minor version 1.1.0, due to API changes.
Update changeLog_doc.h
Class "CDifodo" no longer needs Eigen Sparse

The "Eigen/sparse" libs are not necessary for CDifodo (Visual Odometry)
because the algebraic system to solve is not sparse anymore (it
originally was...)
MRPTConfig.cmake exports SuiteSparse include dir (Fixes #17)
Merge remote-tracking branch 'upstream/master'
Some minor changes to the openNI2_to_rawlog sample