Merge pull request #81 from stnava/pac

Added a test / debug mode to scripts (-z). Lets you run antsCorticalThic...
DOC:  Adding std::cerr for Sandy.
BUG: from Omar Ocegueda omarocegueda@users.sf.net ---   just wanted to point out the + k3 \* \(x3 - c2\) instead of + k3 \* \(x3 - c3\)
Merge branch 'master' of github.com:stnava/ANTs
...
ENH:  Adding option to do mesh -> image.
ENH:  Adding option to do mesh -> image.
ENH:  Adding ability to go from mesh -> binary image.
ENH:  Added stl and ply readers.
WIP: anisotropic diffusion in sccan
ENH: Perona-Malik in ImageMath
ENH: Perona-Malik in ImageMath
WIP: Perona-Malik time step
WIP: avoid warning in PM filtering
WIP: Perona-Malik time step
WIP: PM smoothing; BUG: convergence of binary search
WIP: meaning of covering in cca different than pca
WIP: ...
ENH:  Adding voxelwise max.
Update README.md
Update README.md