point utils added
dem_mosaic: Use vw function nextpow2
point2dem depends on liblas
PointUtils added
point2grid: Robustness
point2las and point2mesh: Use pointutils
Refine headers
Core depends on liblas -- a small lib
OrthoRasterizer: Fix bug, refine headers
point2dem : Read las files
point2dem: More tweaks for las
configure.ac: Rm whitespace
docs: Tweak wording