Event types
Event types

Added type information to 'on' and 'once' so that event listeners have real type information

AgentME/DefinitelyTyped,mcliment/DefinitelyTyped,borisyankov/DefinitelyTyped,AgentME/DefinitelyTyped,markogresak/DefinitelyTyped,magny/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,magny/DefinitelyTyped,AgentME/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,AgentME/DefinitelyTyped,dsebastien/DefinitelyTyped