Build js file with r.js
优化代码，合并改成r.js来实现
添加文档
merge confilict from upstream
fix conflict from upstream
Merge pull request #118 from 2betop/master

Optimize
optimize
Merge pull request #120 from 2betop/master

optimize
add some test cases
add travis
Merge pull request #122 from 2betop/master

Optimize
gh-page
Merge pull request #123 from 2betop/master

gh-page
remove npm install statement
Merge pull request #124 from 2betop/master

remove npm install statement
optimize
Merge pull request #125 from 2betop/master

optimize
transfer webuploader to fex-team
Merge pull request #127 from 2betop/master

transfer webuploader to fex-team
use load-grunt-tasks to load all tasks.