Merge pull request #30 from ChrisBoesch/master

update
debug for previous commit and ACE editor issue #1
Merge pull request #446 from LI-HE/master

debug for previous commit and ACE editor issue #1
change back
Merge pull request #447 from LI-HE/master

change back
Ace debug #2
Merge pull request #448 from LI-HE/master

Ace debug #2
Ace debug #3
Merge pull request #449 from LI-HE/master

Ace debug #3
Merge pull request #23 from ChrisBoesch/master

Update