update metric token separator to .
add CHANGES file
update poms for 2.0.0
Merge remote-tracking branch 'racker/master' into v2.0

Conflicts:
	blueflood-core/src/main/java/com/rackspacecloud/blueflood/service/Configuration.java
use new-style configuration interface
update pom versions to 2.0.0
Merge pull request #125 from fourk/v2.0

v2.0.0 -- Update separator token from ',' to '.'