Added kerberos test runner, url parser support and tests
Adding auth package
GSSAPI Working for single connection
Added TODO's
Added more tests for kerberos, and re-authentication ability
Fixed to package
Fixes to catch missing Kerberos library
Authentication with SSPI worked
Changed to use kerberos lib mongodb ssip process
Added win32 tests for kerberos
Merge branch 'master' into sasl
Ensure legal selector and document option for update option #921
Cleanup of exports #926