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.
Use $.parseXml for parsing string as XML
Small formatting change

Needed to change spacing to pass through jshint
Add coordinates conversion methods to viewport.
Rollback basic.html and create coordinates.html.
Fix unit tests.
Fix documentation.
Update openseadragon.js
Update viewer.js
Update viewer.js

Remove the sequence control update and put it into its own function. This way it can be called after a tilesource is loaded.
Update viewer.js
Update viewer.js
Update openseadragon.js

Missing colon
Update viewer.js
Update viewer.js
Update viewer.js

trailing white space....
Merge pull request #243 from avandecreme/master

Add coordinates conversion methods to viewport.
Changlog for #243
Update openseadragon.js

Align initialPage value
Update viewer.js

Formatting; descriptions; rename sequenceButtons to _updateSequenceButtons
Update viewer.js

description; Move _updateSequenceButtons behind goToPage()
Update viewer.js

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