[algorithms] Overlap interface revision

* Now it accepts not only binary files, also ROI files with multiple
  labels.
* Volumes can be handled in voxel units (as formerly) and mm3
* Keeps backwards compatibility of outputs and inputs
remove deb packages installation
Fixed tests.
Added more connectivity matrix options in Camino interface
Conmat test function
Added xor option in Camino connectivity for robustness
Added xor parameter for robustness
added no dep install version. we'll be testing on both.
fixed bash conditionals
another attempt at fixing bash conditionals
Add tests
tiny typo
Merge pull request #934 from chrisfilo/fix/travis

WIP: fixing travis
Merge remote-tracking branch 'origin/pr/936'
Merge pull request #925 from oesteban/enh/OverlapOfROIs

[algorithms] Overlap interface revision