增加了主页面回退按钮，修改了主页面回退按键逻辑，删除了Log代码
Merge branch 'master' of github.com:momoplan/Android

Conflicts:
	Ruyicai_General/v4.0.0_plugin/project.properties
	Ruyicai_General/v4.0.0_plugin/res/values/ids.xml
	Ruyicai_General/v4.0.0_plugin/res/values/public.xml
	Ruyicai_General/v4.0.0_plugin/src/com/ruyicai/activity/home/HomeActivity.java