Add win-bd to readme
Merge pull request #21 from rvraghav93/patch-1

Add win-bd to readme
Merge pull request #22 from janosgyerik/testable-and-some-tests

Testable and some tests
Thanks @janosgyerik
Added credits to janosgyerik for the test cases
no need for index
removed the index tests
simplified the regexes in the sed
removed unnecessary quotes
renamed OLDPWD to oldpwd to avoid messing with the *real* OLDPWD
replaced sed with perl for the -si case