Hybrid Types section expansion

[starksm64]

I was having a hard time understanding how one would create a class implementing a hybrid type, and then ran across this posting which explained this issue:
http://stackoverflow.com/questions/25340601/typescript-hybrid-type-implementation

It would be nice of the Hybrid Types section could include an example function returning the hybrid type as was done in the posting, and further explain that one cannot create a TypeScript class that implements a hybrid type interface.

function getCounter():Counter{
var counter = function(start:number){};
counter.interval = 123;
counter.reset = function(){};
return counter;
}

var c: Counter = getCounter();
...

[starksm64]

See #24