Added cropToImageEdges method to Line class
Corrected method extendToImageEdges in Line class.
Tests added for cropToImageEdges and extendToImageEdges
Corrected bresengam_line method in ImageClass.

There was a bug with cropping lines. So if the line bigger than image
then it just set endpoints to image edges without saving slope of the
line.
Merge branch 'extend_crop' of github.com:polart/SimpleCV into polart-extend_crop
uhg standard
Merge branch 'develop' of https://github.com/sightmachine/SimpleCV into develop
Added Hough standard transmission to findLines.

Endpoints of the line are found with Bresenham's line algorithm.
Added test for Hough standard transmission
Added sample images for Hough transmission
bug due to confidence resolved

Signed-off-by: jayrambhia <jayrambhia777@gmail.com>
Merge pull request #490 from jayrambhia/Features/fisher_broken_test

bug in fisherface preditction due to confidence resolved
One small fix to docs
Merge branch 'develop' of github.com:sightmachine/SimpleCV into develop
Merge branch 'develop' of https://github.com/sightmachine/SimpleCV into develop
Merge pull request #489 from polart/hough_standard

Hough standard transform for findLines()
Trying to appease the TravisCI beast
Merge branch 'develop' of https://github.com/sightmachine/SimpleCV into develop
avg,lightness,luminosity methods
avg,lightness,luminosity methods added