copied lsqadj.c and .h from src_c cause we need matmul in ray_tracing.
modified lsqadj.{c,h} according to the openptv standard
added check_lsqadj.c
added check_lsqadj to CMakeLists.txt in /src and in /tests
code clean-up (comments, Beat name)
added includes to the lsqadj.c
fixed a line in CMakeLists.txt to call check_lsqadj
Merge pull request #1 from alexlib/lsqadj

Load update from lsqadj pull request