using jsonp to allow for crossdomain xhr requests

[captnswing]

Graphite seems to support jsonp as of late. I changed tasseo.js to use jsonp in the jQuery.ajax xhr call.

This allows tasseo to be used on another machine than the graphite machine.

[obfuscurity]

@captnswing - Tasseo used to do JSONP. Unfortunately, there is a significant memory leak condition when using JSONP.

#17
262df59

I'm surprised this diff works as submitted. IIRC you need to also set jsonp: 'jsonp' so it will recognize Graphite's callback name.

[captnswing]

ok, apologies for not scanning earlier PRs before submitting this.
PS works on my machine, so far so good :-P

[obfuscurity]

@captnswing - No worries. FWIW I'd like to offer JSONP support again, but it will need to be raw javascript without jQuery (as it appears they have no intention on fixing this bug).