Starting 3D parallel geometry work
Increased default number of projection images for lowmem option
Merge branch 'master' of github.com:SimonRit/RTK
Added trick to fix half scan FBP in parallel geometry
Adapted to parallel geometry
FOV is no more assumed to be symmetrical on each side of the rotation
plane. Adapted to parallel geometry as well.
Fixed uninitialized memory problems
Fixed memory leaks
Merge branch 'master' of github.com:SimonRit/RTK