Merge pull request #20 from ivanzhaowy/master

Fix user's avatar and displayName.
polish pref to back
Merge pull request #22 from ivanzhaowy/master

Remove empty line of logs.
Merge remote-tracking branch 'wandou/master'
fix edit module and add limit in task module
Merge pull request #23 from ivanzhaowy/master

Polish task item time visualisation.
Merge remote-tracking branch 'wandou/master'
modify path of taskList

Signed-off-by: miaojian <kitemao@gmail.com>
Merge pull request #24 from kitemao/master

merge
modify socket logic

Signed-off-by: miaojian <kitemao@gmail.com>
add prefix 'io' to socket namespace

Signed-off-by: miaojian <kitemao@gmail.com>
Merge remote-tracking branch 'wandou/master'
Merge pull request #25 from kitemao/master

modify socket logic
add toTopBtn to console log in task page

Signed-off-by: miaojian <kitemao@gmail.com>
Merge remote-tracking branch 'wandou/master'
remove console.log

Signed-off-by: miaojian <kitemao@gmail.com>
polish toTopBtn class

Signed-off-by: miaojian <kitemao@gmail.com>
polish toTopBtn logic

Signed-off-by: miaojian <kitemao@gmail.com>
Merge pull request #26 from kitemao/master

add toTopBtn to console log in task page
Change API server URL to production server.