REV: remove unnecessary code

Change-Id: I2dcd2c0b07e6a499ddbf4fcdfae824a2d778dfea
Merge pull request #1 from tkdchen/master

Remove unnecessary function.
REV: make Room class in a standalone module file
REV: refactor socket/index.js
REV: clean sockets/index.js

Change-Id: Id4286e78dc2bd972acea00271182fa3810f42f7f
REV: fix typo
REV: fix another same typo
REV: change placeholder of username input in login page

Placeholder `Username` is more general than `Kerberos name` due to we cannot
assume what authentication is used.
Merge pull request #2 from tkdchen/master

make Room class in a standalone module file
REV: change lint config

Two changes:

- anon: true, to allow to omit space in anonymous function declaration. The
original rule is too strict. And many code in most Javascript projects also
allow this rule.

- devel: true, to allow console function call. We have to pay more attention to
this. This rule allows us to write console.error to log error message, however
console.log is also allowed. Be careful, please remove all unnecessary
console.log and console.error that are specific to debug.

Change-Id: I269bdffa7138481fe714081e6106f79626452d3f
REV: upgrade 0.5
Merge pull request #7 from xiaods/develop

REV: upgrade 0.5
REV: cantas 0.6 release

core feature:
1. support import trello export board json file.
2. support card image cover
2. support file upload to cantas
FIX: enhance some description
REV: apply authors doc
some grammar errors
Merge pull request #9 from dotcom900825/patch-1

FIX: some grammar errors in README
REV: enhance documents layout

AUTHORS.md and README.md, the user list have not list correct. fix it.
apply a project preview image to README.md
REV: Release 0.7 codebase

this version we will integrate bugzilla importer feature. it help
us can easily handle bug tracking workload.
Update README.md

fixed typo in README.md