Merge branch 'release/0.3.4' into develop
Update project version for further development.
Improve core.cache-missing detection.

In some cases, (AOT-related?) attempting to require 'clojure.core.cache
does not result in a FileNotFoundException, but an
ExceptionInInitializerError instead. See
https://github.com/technomancy/leiningen/issues/1739.
Merge remote-tracking branch 'technomancy/core-cache-catch-fix' into develop
Update project version to 0.3.5.
Update README.md for 0.3.5.
Merge branch 'release/0.3.5'