Moved callable check from CreateMatcher to ActionMatchers::Matcher.
Removed instance variable for instrument hook.
Improved Warp::Instrument to record the return value from wrapped calls.
Merge branch 'master' of github.com:thomasfedb/warp
Use JamJar to generate testing models.
Specify minimum Ruby version in .gemspec.
Added a DestroyMatcher.
Added destroy matcher to README.md.