git is a distributed version control system.
git is free software distributed under the GPL.
Createing a new branch is quick.
Creating a new branch is quick and simple.



temp record:
1.
http://www.databaseskill.com/2467108/
2.
http://sysmagazine.com/posts/191842/
3.
http://blog.csdn.net/column/details/launcher.html
4.

http://www.databaseskill.com/3347701/

http://www.phonesdevelopers.com/1736657/

http://www.cnblogs.com/xiaoxiaoboke/archive/2012/02/08/2342899.html

http://www.360doc.com/content/12/0109/11/7724936_178258441.shtml

http://johnsonxu.iteye.com/blog/1933655

https://blahti.wordpress.com/2011/02/10/moving-views-part-3/

http://blog.csdn.net/lilu_leo/article/details/6910643

http://search.aol.com/aol/search?s_chn=prt_main5&v_t=comsearch&page=2&q=android+launcher+DragController+DragLayer&s_it=topsearchbox.search&oreq=27f1281a76fe4d4994e60dfe600d5463