Implemented grayscale morphology and surface boolean operations
Added image normalization and otsu multi-thresholding
Made image initialization optionally non interactive
Added profileidlist as seed selector in vmtkcenterlines, for specifying a list of open profile ids as source and targets at the command line.
Changes for detecting crashes on linux 64 bit
Catching exceptions
Disabled safe border
Removed debugging comments
Using review statistics
Allow zero radius
Fixed documentation, thanks to Jie Chen
Added tolerance
Use system zlib in ITK
Revert "Use system zlib in ITK"

This reverts commit 3fc3899a8085ae34a3fbd73c44558ab4973c8764.
Added script for clipping using polyball and tube functions.
Added cutlines output to surface clipper
Added cut surface output to mesh clipper
Rearranged polyball evaluation inputs
Changed option names in surface and mesh array operation scripts.
Added mesh array operation script