Hard Fault

I just want to say thank you for this. Reactive-rx is exactly what I was looking for in a RPC communication protocol that used JSON.

Added AliasProperty and tests

5

Added an `AliasProperty` similar to Kivy but without the `kv` language specific attributes. This required refactoring the `__new__` method of the `Dispatcher` class. The bind argument to AliasProperty requires properties...