Merge pull request #18 from lantiga/master

Fixing compilation for XCode 4.3.x
Merge pull request #19 from lantiga/master

Fixed VTK tag
Merge pull request #20 from lantiga/master

Fixed issue with __init__.py in root
Merge pull request #21 from lantiga/master

Fixes to __init__ issue
Merge pull request #22 from lantiga/master

Fixed woes with installing __init__.py
Merge pull request #24 from lantiga/master

Modified vtk tag
Merge pull request #31 from lantiga/master

Release 1.0.0
Merge pull request #32 from lantiga/master

Fixed glitch with vmtkcenterlines interaction
Merge pull request #33 from lantiga/master

Allow negative values in text input mode.
More explicitly fail on module import
Working around segfaults
More explicitly fail on module import
Allow dot while inputing parameters
Safeguard against import via multiprocessing on Windows
PypePad now uses multiprocessing for vmtk jobs.
Changed save location for screenshots (now home directory). Added support for keypad input. Fixed bug with - and .
Indentation fixes
Adjusted window size. Subdivided scriptname menu
Added support for dot, minus and return in the keypad
Catch broken pipe in forked process, exit gracefully