Update project dependencies

- Bump `clojure` ("1.2.1" to "1.6.0")
- Bump `clj-aws-s3` ("0.3.8" to "0.3.9")
- Bump `clj-time` ("0.5.0" to "0.6.0")
- Bump `aws-java-sdk` ("1.6.12" to "1.7.5")
- Bump `codox` ("0.6.6" to "0.6.7")