remove bug functions from release version
Update CONTRIBUTING.md
add license info
Update README.md
bug fixes and add functions
add namespace clustering
initial version of cmake

This still has some bugs, just for backup.
fixes bug: ml install
[cmake] add lib ver num and debug mode notation
[bug fixes] make nadd2013 is workable
bug fixes
Merge pull request #3 from yunfuliu/CMake

Add functionality of supporting CMake
add manual
Rename MANUAL.txt to MANUAL.md
Update MANUAL.md
Update README.md
Merge branch 'master' of https://github.com/yunfuliu/pixkit
add two enhancement functions
remove std namespace
Merge pull request #2 from JieCyun/master

bug fixes and add two enhancement functions