Added "-a" option string to cmd_ls
Missed word spell
This script provide any function about git reference
mistaked english at refarence help
Add 'detail' option
Changed argument position
Remove 'if you set' sentences
Append behavior when user set argument of only reference
Remove '--detail' argument
Append '--ls' behavior
Remove default attribute of add_argument
Use FileType flag to file options, and written methods of arguments
control
Create '--file' option behavior
Complete create git-ref.py