Merge pull request #1 from mhald/master

Added counter support in for Librato Metrics
Merge pull request #2 from mhald/master

Added support for Librato's continuously increasing counters
Issue tigertext/xmpp#1343: updated eper
Merge pull request #3 from inaka/elbrujohalcon.eper

Issue tigertext/xmpp#1343: updated eper
added lager and a sensu log handler
added EMakefile