1. created module bioinspired. 2.transfered Retina module into the new module bioinspired. 3. added a fast tone mapping method to Retina interface and wrapped existing reinafilter dedicated method
updated demos and tutorial regarding the Retina class transfer to bioinspired module.
minor correction after buildbot warnings
last warnings solved
Merge branch 'master' of code.opencv.org:opencv
added test to save image with webp with alpha channel
drawMatches python bindings
SIFT+SURF PyDocs
feature2d drawing functions PyDocs
PyDocs for FAST, ORB etc
PyDocs for common interface of feature2d
switched to Input/Output Array in gpuwarping functions
refactored gpu::ImagePyramid (converted it to abstract interface)
updated documentation
added stub library for cudev module

in order to make CMake scripts work properly
Merge pull request #1101 from jet47:cudev-stub-lib
Merge pull request #1107 from abidrahmank:master
added support image with alpha channel
updated webp to version 0.3.1
retina included in namespace bioinspired + followed suggestions made by Vadim