Change the packages to jessitron.bison
Rename project to bison
Add default argument for Opinion text
Make tweet-length ranker test less precise

It failed once on a length tie with 400 and 399 points. meh
Move ranker stuff to a ranker dir
Ranker refactor

Move most of the functionality up into the trait, and let
the ranker simply formulate the opinion.
Fix to Ranker refactor

Oddly, I get a MatchError when typing things inside a
val (a:A, b:B) = //blaha
But the whole thing works if instead I
val (a,b): (A,B)
lovely, Scala. :-/
An outline of a test for Durable State