Added gammaCorrect() in Imageclass.py
Added tests and made improvements
Refactored convolve() and added methods for basic statistical parameters
Using lists for mean(), variance(), std()
Updated Display.py with pressed feature enabled

It is with reference to issue no 120
https://github.com/ingenuitas/SimpleCV/issues/120
Added exception raising if linux user does not have permission to work with camera
added motionBlur for images
 #324 fitSpline implemented
Cleaning up tests directory

This is my first step towards cleaning up the tests directory a little bit.
These three images aren't supposed to be here, and they shouldn't come back.
warn and return
Fixes test_optional and test_stereovision breaking

This fixes some tests that were breaking, and also removes a couple of typos.
I also took the liberty of changing some aesthetic stuff, which were non-pythonic.
Adds the /tests/standard folder to .gitignore
Removes test-generated images from repository.
Fixes typo
Moves StereoVision test stuff out of the test root
Fixes test missing stereovision stuff

This fixes one test which also used the StereoVision files. It should probably
be moved to test_stereovision, but whoever put it here must have had a good reason.
Fix typo in ImageClass.py

Replaced "fixex" by "fixed" in example of rotate().
Merge pull request #401 from mfkaptan/patch-1

Fix typo in ImageClass.py. Thanks for keep an eye out for us.
Merge pull request #400 from salil93/ls_error

Minor bug fix in getLineScan/setLinescan. Thanks for your contribution.
Merge pull request #399 from victsou/develop

Cleaning up tests directory. Awesome. Thanks.