Failing rootpath whitelist test

[mcshaz]

Tests added to demonstrate issue #262 (failing with rootpath "/" in whitelist)

[mcshaz]

As you can see from the code, a default page (path /) can now be used in the EndpointWhitelist. Fixing this and making all tests run revealed an issue with the regex tester - namely if whitelisting "get:/foo" the path "get:/foo/bar/baz" is a match.

I would advocate that if that behavior were desired, the whitelist should be written as "get:/foo/*" and this was a problem with the prior implementation. The other option of course would be to let the consuming appSettings file specify "get:/foo$", however this would be quite different behavior to the wildcard match, and would (I believe) require clear documentation.