Initial version of pac4j support for authentication (#257).
Add test coverage for path bindings with multiple leading slashes (#262)

REST Assured doesn't appear to support this sort of path, so I tested with plain URL instead.
Getting this form of path binding to work required removing the validation of leading slashes from TokenPathBinder.
Add test coverage for path bindings with multiple trailing slashes (#262)
Disable codenarc for CI builds

CodeNarc appears to hang in drone.io.
This apparently happened before, resulting in us excluding the codenarcMain and codenarcTest tasks
from running in drone.io.  However, when I added browser tests for ratpack-pac4j, CodeNarc hung on
that source set.  Thus, a more maintainable solution: skip all codenarc tests when the ciBuild flag is set.