Merge branch '2.0.0-rc2'

rc1. Update innuendo and switch from ace to codemirror.

Syntax highlighting of Solutions pages

Merge branch 'release/2.0.0-alpha4'

Merge branch 'release/2.0.0-alpha3'

Merge commit '8a9f2f8a0a7683fa0bad8bf33f209cb915e2ce3c'

Update to clojure 1.4

Switch to refheap for pasting.

Try to recover from OOM issues

Whole buncha new stuff.