Merge pull request #5 from ChrisBoesch/master

update
Merge pull request #6 from ChrisBoesch/master

update
debug for practice play page code highlight and misalignment
Merge pull request #230 from LI-HE/master

debug for practice play page code highlight and misalignment
Merge pull request #232 from ruijunhuang2010/master

Merge pull request #15 from ChrisBoesch/master
Merge pull request #16 from ChrisBoesch/master

update