added more in topic branch for code review

added more in topic branch for code review
Merge pull request #1 from LianweiHuang/test-review

added more in topic branch for code review
add comments in 3rd branch

add comments in 3rd branch
Merge pull request #2 from LianweiHuang/3rdBranch

add comments in 3rd branch
Merge branch 'master' into test3

Conflicts:
	AAA/AAA/AAA.cpp