add ransac.py
add new ignore files
.pyc
add ex_Ransac for image stitching
add ransac related computing to homography.py
Merge branch 'develop' into feature/feature_panoramas

* develop:
  add ransac related computing to homography.py
  add ex_Ransac for image stitching

Conflicts:
	.gitignore
conflict files
Merge branch 'feature/feature_panoramas' into develop
finish homography
next: warp
add warp function
Merge branch 'feature/feature_panorama' into develop
add warp to image stitching
memory problem though
Merge branch 'release/release-0.3'