Fixed P2PDistance

Interface failed because tvtk is loaded with the default value
of ETSConfig.toolkit. Now it is initialized, so now the enthough.traitsui
does not look for $DISPLAY.
PEP8 formatting
bug, added 'priors/' prefix to -p flag
added prefix to output
removed priors directory, all files will be in current directory
bug, added 'priors/' prefix to -p flag
added prefix to output
removed priors directory, all files will be in current directory
Merge branch 'master' of https://github.com/armaneshaghi/nipype
Added a page listing software using Nipype.
interface and node tests passed
output prefix was fixed
check if input comes with full path or not
More specific error handling
fixing try-except for ets
Merge pull request #953 from armaneshaghi/master

bug in antsCorticalThickness
Merge pull request #963 from oesteban/bug/TVTKDisplayError

Improve tvtk import
Merge pull request #960 from chrisfilo/enh_software_using_nipype

Added a page listing software using Nipype.
Added SMAL to the list.
Added Overlap test