Improved readability by correcting grammar and idioms.

Further improved language and readability.

Attempted to fix list bullets.

Again, attempted to fix list bullets.

Removed trailing whitespace on line 8.

0 corresponds to FLANN_INDEX_LINEAR

There were two bugs that were solved here.Changes were done after extreme testing.
1.replaced cv2.solvePnPRansac() with cv2.solvePnP() previous fc was giving terrible errors.
2.The code was incapable of saving edited pics;Now fixed with little code mods.

In the camera calibration code { cv2.cornerSubPix() } will be of no use.In the updated code it is assigned to the (corners2) variable 
which is passed down to { cv2.drawChessboardCorners() }

GSoC Python Tutorials

removed white spaces

removed blank lines at EOF

removed duplicate labels