upped dependencies and increased version to 0.2.4-SNAPSHOT

clojure -> 1.5
clojure-commons -> 1.4.1-SNAPSHOT
jargon-core -> 3.3.0
jargon-data-utils -> 3.3.0
jargon-transfer-engine -> 3.3.0
jargon-security -> 3.3.0
jargon-ticket -> 3.3.0
slingshot -> 0.10.3
tools.logging -> 0.2.6
boxy -> 0.1.2-SNAPSHOT