toStreamFromProperty
Creates a stream on a {Observable} object that gets updated whenever the property value on the observable changes.
    canStream.toStreamFromProperty( obs, propName )
  
  Creates a stream based on property value change on observable
var map = {
    foo: "bar"
};
var stream = canStreaming.toStreamFromProperty(map, 'foo');
stream.onValue(function(value){
  console.log(value); // -> foobar
});
map.foo = "foobar";
  
  Parameters
- An 
{Observable}:observable object
 - property 
{String}:name
 
Returns
 {Stream}: 
A stream.