Create lein projects, bump dependency versions

For my own work, I found it helpful to create Leiningen projects for KR. I discovered some rather old dependencies in KR while doing this, so I went ahead and bumped those. Somewhat poor form to do both of these things in a single PR, admittedly. My apologies for that.

Submitting this as a PR in case it is of some use.

Note: if you use any pom-generating lein tasks - install, deploy, etc - it will overwrite the existing poms.