Implement ability to define period for counter or gauge measurement
Implement ability to define period for counter or gauge measurement
Merge branch 'master' of github.com:brenzenb/librato-java

Conflicts:
	src/main/java/com/librato/metrics/MultiSampleGaugeMeasurement.java
Remove unnecessary map insert
Don't need to set the period here b/c that's done in LibratoBatch
Formatting
Merge branch 'brenzenb-master'