画线
画折线
编写线条抽象类
fix line
Merge branch 'ansel' of https://github.com/lln7777/zhuyun into sx

Conflicts:
	public/javascripts/lines.js
fix bug
Merge branch 'ansel' of https://github.com/lln7777/zhuyun into sx
测试折线
test
修改Line类，fix bug
 Merge branch 'jack' of https://github.com/lln7777/zhuyun into sx

Conflicts:
	public/javascripts/components.coffee
	public/javascripts/components.js
	public/javascripts/funcs.coffee
	public/javascripts/funcs.js
	public/javascripts/global.coffee
	public/javascripts/index.js
去掉画直线的文字
完善组件和层的四个角事件和操作