major reorganization - lots of stuff broken right now

new .gitignore file

new ext directory for external libraries like jquery

new tests folder for qunit tests

new gruntfile and package.json for building

new lib directory - moved master copies of js and css to subdirectories

moved aqehelper.crx to lib directory - js and css will now be copied into it

new lib/aqehelper.xpi for start of work on Firefox extension