- updated bower.json, gitignore and test-commands with correct, working settings
- fixed various issues in assetManager and related elements
 * stl parser and xhrStore added/fixed (these are just for demo purposes)
 * removed useless dependencies
 * added hack for XMLHttpRequest node/browser
- basic demo is working !
 * loading files using xhr store + stl parser works
 * added demo stl files (to get arround cross domain issues (depends on http server))
 * various experimens with related polymer elements