update help patches
fix linking issue
auto create opencv libdir

am i on the right way ? not sure at all...
move sources and helpfiles to subfolders
add automake files
update build system
add pix_opencv.cc to SOURCES
move and delete some files
update Makefile.am

disable pix_opencv_surf for now (it needed non free lib)
forgot Blob.hpp
update .gitignore
check for OpenCV lib in ./configure

Signed-off-by: Antoine Villeret <antoine.villeret@gmail.com>
build only if lib is installed
better format string
detect facetracker library
add a .WAIT dependency to wait for other to finish

this doesn't seem to work, thus it is commented out
notify available features on load
add a rule to generate an overview patch
rename some files
add help and examples folder to installation