add gem description in README.md
upload project introductions to ref/
rename ref/project ref/deman.doc
add Introductions link in README.md
fix #2 package robot location to Point
replace moving step of Robot with magic number
fix #6 package action to command in Turn
#8 add continuous integration with Travis CI
Adding Status Images of Travis CI to README Files
change author name and email
introduce the gem in detail
Update README.md
update header
合并冲突
合并冲突
使用命令模式重构rebot