CORE-3929: switched from clojure.data.json to cheshire
CORE-4031: added some new message templates
CORE-4031: modified the name of the email template used for a completed tool request to match the name of the tool request status
upped dependencies and increased version

clojure -> 1.5.1
clojure-commons -> 1.4.1-SNAPSHOT
lein-iplant-rpm -> 1.4.1-SNAPSHOT
Added logging of all email messages. We're also logging errors.
Fixed the logging so the body only appears in the error messages.
Merge branch '1.8' into dev