Added testdata for Fisheye

Replaced files with corners

minor

deleted useless image
regenerated the reference ECC results
regenerated the reference ECC results
Merge pull request #201 from vpisarev:minor_fixes
Merge commit '1c61699a072' into stitch-fix

* commit '1c61699a072':
  Added testdata for Fisheye
Merge pull request #203 from mshabunin:stitch-fix