Initial stubs for pluggable backends
Progress
More progress!
Converted tests for instrumentation metaprogramming to use assertions
Add mock_backend tests
Add logger_backend test
Port integration test
Move prefix handling to Metric class.
Allow skipping the StatsD.prefix by passing no_prefix: true.
Port udp protocol tests
Add tests for assertions helpers
Allow assert_no_statsd_calls without metric name
Add tests for environment detection
Split mock backend in null and capture backends
capture_statsd_metrics -> capture_statsd_calls
Clean up unused variable
Use info as log level in the logger backend
Fix environment tests
Use constant for default implementation
Use StatsD.logger for logger backend