Split CellBehavior from Actor to allow for simple Erlang-like actors
Split exclusive logic between Actor and Cell
Merge pull request #291 from celluloid/split-actor-from-subject

Split CellBehavior from Actor to allow for simple Erlang-like actors
Move finalizer to be a behavior option
Add JRuby back to allowed CI failures

JRuby 1.7.4 and below have a number of problems with the fiber implementation
leading to deadlocks and other stuck threads.

1.7.5 will hopefully address these problems!
Use the Cell to create the Actor
Push the delayed system events on the Mailbox after linking is complete
Return the behavior proxy from Actor.all
Merge pull request #325 from celluloid/events-after-linking

Linking actors can cause tasks to be created incorrectly
Merge pull request #10 from celluloid/master

Catch up...