android使用5.0的toolbar，自定义布局参考地址

参考：
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/1118/2006.html

https://github.com/mosil/Android-Mosil-Sample-Toolbar

http://www.codes51.com/article/detail_144474.html

http://blog.csdn.net/lmj623565791/article/details/45303349