Merge pull request #26 from kitemao/master

add toTopBtn to console log in task page
Change API server URL to production server.
Merge remote-tracking branch 'upstream/master'

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Merge pull request #27 from ivanzhaowy/master

Merge
Add support for mutil-enviroment.
Merge pull request #28 from ivanzhaowy/master

Add support for mutil-enviroment.
Fix case sensitive bug.
Merge pull request #29 from ivanzhaowy/master

Fix case sensitive bug.
Polish code style.
Adjust build config.
Merge pull request #30 from ivanzhaowy/master

Merge
Fix socket.io config.
Merge pull request #31 from ivanzhaowy/master

Fix socket.io config.
Merge remote-tracking branch 'wandou/master'