New and edited buttons for Clojure Android projects

I patched my fork to add new buttons as addressed in https://github.com/oakes/Nightcode/issues/37

These are what the buttons do now:

Build                => build, apk, install
Run                  => run (doesn't build project first)
Run with REPL => run, forward-port, repl (doesn't build project first)
Doall                => doall, repl (what Run with REPL used to do)
Release           => what 'Build' used to do

I have only tested with Clojure Android projects, and I'm not sure if this affects other kinds of projects. Also, this patch changed the versions of lein-droid to 0.2.0-preview4 and neko 3.0.0-preview4. I've never made a pull request before, so I don't know how to leave that part out of it.