html() and append functionality

[shiffman]

I'm noticing that with p5.dom.js I'm helping students do the following quite a bit:

var currenthtml = elt.html();
var newhtml = "some more stuff";
elt.html(currenthtml + newhtml);

JQuery I believe has an append() function, I wonder if we should consider something like one of the following?

elt.appendHtml('some more stuff');
elt.html('some more stuff', APPEND);

[lmccart]

I like the second version here, I'll add it next chance I get