Initial commit
init commit best.R, still buggy
Merge https://github.com/minqiang/ProgrammingAssignment3
fixed the bug of invalid state
added pdf descriptions and data set
added file rankhospital.R. Fixed a bug in best.R with invalid outcome
input.
rmoved a comment
Merge branch 'master' of https://github.com/minqiang/ProgrammingAssignment3

Conflicts:
	README.md