IE 10 not reading DZI file correctly

IE 10 is treating the data coming back from the JSONP request as a
string and not as XML. I have confirmed this issue is happening on
numerous IE10 machines but have not seen it on any other browser.

The change simply checks the type of the data variable and if it is a
string it parses the string as XML and updates the data object.
Renamed EventHandler to EventSource (#225)
Use $.parseXml for parsing string as XML
Small formatting change

Needed to change spacing to pass through jshint
Merge pull request #228 from msalsbery/EventHandler-Rename

Renamed EventHandler to EventSource (#225)
Changelog for #225
Event Names Normalized

All event names lower case with no hyphens
Made breaking changes more clear
string.js quotes/whitespace fix
eventsource.js comment fix
Event Names Normalized

Compound event names lower case with hyphen.
Button event names removed "on" and made lower case.
changelog update for new event names
Merge pull request #230 from jpstroop/master

IIIF Image API 1.1 Tile Source
added support for iiif 1.1
use pixels for size instead of pct
configureFromObject uses @id
fixed size param
supports IIIF 1.1 syntax
added test for 1.1; renamed 11 to 1_1
Adding iiif 1.0 info samples