Local merge due to conflicts
MNT: Refactor

- moved tests folder from root of repo into vttools/
- putting pieces in place to add coveralls to this repo
- moved fitting tests from nsls2 repo to here
- added test for quadratic model
Merge remote-tracking branch 'origin/master' into fit_refactor

Conflicts:
	vttools/vtmods/import_lists/modules.yaml
ENH: First attempt at travis & coveralls integration
ENH: Added coveralls & travis badges
MNT: Second attempt at travis
MNT: Travis try 3
MNT: Travis try 4
MNT: Travis try 5
MNT: Travis try 6
MNT: Travis try 6
Removed py3 from travis config
MNT: Refactor due to skimage name change
Merge pull request #32 from ericdill/fit_refactor

Refactored VisTrails stuff from nsls2.fitting into VTTools