Merge pull request #1 from RubyLouvre/master

get new version
add bower_dist
fix #360
Merge pull request #361 from exolution/master

add bower package
Merge branch 'master' of https://github.com/RubyLouvre/avalon into RubyLouvre-master

Conflicts:
	avalon.js
fix #360

修复当节点为typeerror时的错误，判断elem是否存在getAttributeNode，不存在就不进行扫描