v1.0.0.pre2

• Simplification of RubySingleThreadExecutor
• Async improvements
  • Each object uses its own SingleThreadExecutor instead of the global thread pool.
  • No longers supports executor injection
  • Much better documentation
• Atom updates
  • No longer Dereferenceable
  • Now Observable
  • Added a #reset method
• Brand new Agent API and implementation. Now functionally equivalent to Clojure.
• Continued improvements to the synchronization layer