[test]: adjust all the routines of single and multi udisk test
[test]: more test introduction for README
[test]: small style fix for README
[test]: make multi udisk test work correctly and now we can handle 2 udisks
Merge remote-tracking branch 'keepod/master'
[test]: short name for test scripts and add test for md5 checking
Merge pull request #10 from pengphei/master

more test routines for issue #6