Merge pull request #321 from adrienkaiser/update-DTIAtlasBuilder

BUG: fix Testing with python on linux and pop ups on mac/win
update s4ext
Add ErodeDilateLabel extension. This extension applies binary erosion and dilation to label maps.
BUG: Fix crash when pressing clear button on latest Slicer versions
Merge pull request #324 from lchauvin/update-PathPlanner

BUG: Fix crash when pressing clear button on latest Slicer versions
Merge pull request #323 from tokjun/add-ErodeDilateLabel

Add ErodeDilateLabel extension.
Added Andriy as contributor. Added PkSolver to packaging.
Merge pull request #325 from millerjv/update-PkModeling

Added Andriy as contributor. Added PkSolver to packaging.
Update ErodeDilateLabel extension to fix build_subdirectory field. The s4ext file is replaced by one automatically generated
Merge pull request #327 from tokjun/update-ErodeDilateLabel

Update ErodeDilateLabel extension to fix build_subdirectory field.
BUG: add toplevel cmake file, use public git url
Merge pull request #322 from pkarasev3/update-KSlice

update s4ext
BUG: Fix Qt compilation issue + simplify library logic