Add test suite converted to rspec
Update gemfiles for travis builds. Minor spec fixes for 1.8.7 - not passing on 1.8.7 yet
Fold in rspec_pristine. Fix identity map method aliasing, unbreaks specs on 1.8.7.
Add jruby to travis
Eliminate a bunch of uninitialized ivar warnings. Slightly improve the runtime of Key#get by avoiding a few method calls.