add package.json for npm deps management, remove jszip submodule
add requirejs grunt task to minify to a single file
upgrade to jszip 2.1.0
allow override of all zip.generate options
correct JSZip dependency path
add build instructions
prevent double appending of border nodes (causes problems with XMLDOM.js)
use XMLDOM.toString when serializing XMLDOM objects
use empty elements when no content, don't leave space when no attrs (causes parse error in Excel)
turn on optimization in Gruntfile.js
avoid exception on null values & optimize array access
package unminified version of underscore as it will be uglified by r.js anyway
change demo.html to use node_modules
escape attributes & text content in fake XMLDOM
Ignore file was misssing
Merge fix
Demo should be usable out of the box, with no installation needed
Made sure that downloadify is being included in the demo