pc_align: Resample file while reading
Save transformed datasets wout loading fully in memory
configure: Require Boost to find libpointmatcher

Libpointmatcher links against:

yaml
nabo
boost_thread
boost_filesystem
boost_system
boost_program_options
boost_date_time
libstdc++
pc_align: Debug code
pc_align: Load more pts if filter gross outliers
pc_align: Save errors in csv
Fix doc
pc_align: Shift in respect to first point
pc_align: More memory reduction
pc_align: More memory reduction
pc_align: Turn on verbose mode by default
sparse_disp: Allow user to pass options directly to this tool
build_vw_asp: script to build ASP/VW
build_vw_asp: default source dir change
sparse_disp: minor changes + better handling of failed matches

Gaps where the epipolar test failed are now marked in D_sub_spread with zeros.
Other improvements:
-- only 25% of the search window must be marked valid for a search to occur (had been 50%)
-- the valid mask is diated before writing or before being used to mask D_sub_spread
-- initial search pts now can be as little as coarse_skip/4 from the image edges
-- A larger percentile fraction of disparites are used in calculating the epipolar vector
sparse_disp: fix minor bugs

small typos fixed
sparse_disp: check and clamp point indices
build_vw_asp: new dependencies for pc_align
build_vw_asp: need eigen include flag
sparse_disp: revert clamp fix