Fix call to name and some other issues related with http_router.

The attr_reader named was not longer available after the following commit:
   https://github.com/joshbuddy/http_router/commit/6c7285f9ca1b95a32985596727ab3fb68666d00d#L7L3

This changes were probably done against an older version of
http_router.

Also based on
https://github.com/padrino/padrino-framework/commit/587ff7, it seems
like the route has an array of arrays in the first element, handle
that case too.
Update newrelic gem dependency.