Fixed bug in error callback  + status code

Fixed bug in error callback & added status code to error callback
IE10 support

Conflicts:
	jquery.filedrop.min.js
Merge remote-tracking branch 'remotes/hattan/master'

Conflicts:
	jquery.filedrop.js
Add example, derived from http://jqueryfiledrop.apphb.com/

Added this.filedropInfo() API to obtain the list of files, etc. so user code can access all that info too. (See example for one way to use it.)