introducing a tutorial for the retina model
adding retina tutorial
updated tutorial, need spell check, validation, nicer images and a discussion on parameters
updated tutorial, rapid spell check, retina parameters discussion added
added retina code tutorial
updated first image sample
minor update
minor updates for doc redirections and tutorial images size
Added implementation for RGB to YUV420p color conversion
Added tests for RGB to YUV420p color conversion
Added multithreaded implementation for RGB to YUV420p color conversion
Super Resolution module
Merge pull request #491 from Daniil-Osokin:cvtRGB2YUV420p
moving JNI library to 'build/lib' dir on non-Win
updating JNI lib location for Unix; formatting update
more formatting
Fixed shebangs, added error checking
minor formatting
removing redundant code
Merge pull request #620 from apavlenko:java_tutorial_fix