Implemented the LazyProxy
Implemented MetricMapper#load_measurements

It loads all measurements for a given metric. MetricMapper#find also now takes
the load_measurements option which if set to true causes all the metric
measurements to be loaded.
MetricMappers are now initialzied properly
The /metric/:id response now include measurements
Require lazy_proxy
Initalize the default MetricMapper properly
Add default measurement_mapper
Add default serializers
Add default dependencies
Require q/server
Initialize the default MetricSerializer properly
Use the Q::Server and take twitter measurements every 10m