Set status line on mocked response

The status line wasn't being set if the proxy was
creating its own response. This change sets a staus line,
which allows whitelisting and blacklisting to return the
expected status.
Tests for blacklist and whitelist status codes
Merge pull request #13 from andyclark/fix/set-status-code-mock-response

Fix bug where HTTP status was not set on mocked response
Merge branch 'master' into feature/clear-black-and-white-lists

Conflicts:
	src/test/java/net/lightbody/bmp/proxy/BlackAndWhiteListTest.java

Should allow lightbody/browsermob-proxy#15 to apply cleanly