implemented the root access
added codehale dependencies and Metric initialization
first implementation of metrics
added endpoints
fixed uptime counter
fixed content-length header for JSON responses
fixed histograms metric
update metrics routings
added example on metrics activation
added metrics controllers
added metrics activation keys
more consistent API
start metrics service
new method to interact with the new con metrics key
test frwk for root access
test for root API to change the admin password
more consistent access log format
added gauges for OrientDB data files
armored getConnection() method and added the getOrOpen() one
fixed play bug when using fakeApplication(Hashmap)