Deal with the fact that the visible property is now saved

git-svn-id: http://cheat-engine.googlecode.com/svn/trunk@2623 16004826-78b5-1967-6829-2a7ac34a5c3b
add a getVisible to deal with other causes of state changes

git-svn-id: http://cheat-engine.googlecode.com/svn/trunk@2624 16004826-78b5-1967-6829-2a7ac34a5c3b
Add license and readme
Fixed `README.md`
Merge branch 'master' of github.com:CoolOppo/Cheat-Engine