Cassaforte 2.0.0-beta8

Note: there is a [breaking public API change](http://blog.clojurewerkz.org/blog/2014/10/13/cassaforte-2-dot-0-0-beta8-is-released/) that
may affect some migrations but otherwise it's the most solid Cassaforte release to date.

May be worth bumping Joplin to `0.2.0` after merging this.
Merge pull request #19 from michaelklishin/patch-7

Cassaforte 2.0.0-beta8