Merge pull request #504 from shirlyLoveU/master

fix 绑定了ms-duplex的select，怎么在数据源更新之后显示正确的值
fix getVariables
Merge pull request #505 from shirlyLoveU/master

update avalo
update sanitize过滤器
Merge branch 'master' of github.com:RubyLouvre/avalon
data.html --> data.template
fix sanitize BUG
update avalon.$events.js
update
fix Collection length BUG
this._.length --> this._.size
update Collection _fire
fix locateFragment
update modelFactory
fix ms-include 无限递归的BUG
fix renderedCallback 参数BUG
不再允许别人改绑定属性的前缀
提高缓存的命中率
fix #503 BUG
重构 ms-if