update gem source
update file layout
add description and license of the gem to Rakefile
fix typo of Liscense.txt
update DEVELOPERS_NOTE.md
fix for Ruby 2.0.0
remove unnecessary warning options
fix encoding descriptions in magic comments
update README.md
update README.md
bump up version
Merge branch 'develop'
update extconf.rb due to new OpenCV version constants
fix for mswin32
fix issue #22

Use Ruby's memory allocation function xmalloc() instead of OpenCV's cvAlloc()
to run GC when running out of memory
Merge branch 'develop', remote-tracking branch 'origin' into fix/issues-22_severe_memory_leak
remove dependency on gem-compile
fat gem support
add gem:precompile task to create fat gems
fix for MinGW MSYS shell