event: new package for event multiplexer
event: add some documentation
event: make Unsubscribe idempotent
event: make TypeMux zero value ready to use
all: use (blocking) event package instead of ethreact
ethchain: fix tests
eventer: remove package
ethreact: remove package
event: panic for duplicate type
Merge pull request #58 from fjl/feature/event

Blocking event package