Adding new pyext library (#44).

* Adding event, a simple event class.
* Adding context, a simple global thread local variable system.
Adding unit test/example for pyext/context. (#44)
Adding pyext/event unit test, improving pyext/event. (#44)

* Also documenting unittest.
Adding initial version of new pyDynECS library (#40).

* Finishing core implementation.
* Starting entity_graph and syntax portions.
Cleaning up ecs System model.

* Adding imposters to pyext.
* Cleaning up context variable usage via meta class.
* Adding the start of an example for pydynecs.
Adding thread tasks to pyext (#44).
Adding initial bootstrap plugin system, improving dynecs component managers to cope. (#46, #40)
Adding bootstrap plugin component manager and utility decorator. Renaming TypedComponentManager to CheckedComponentManager (#46, #40).
Adding multimethods to pyext (#44)
Improving madz.bootstrap and pydynecs. Using madz.bootstrap in madz.daemon. (#40, #46)

* Adding IComponentIndex s
* Improving pydynecs, fixing various bugs.
* Refactoring minions into bootstrap plugins.
* Cleaning up pydynecs.syntax, and madz.bootstrap to fit.
Updating readme.