test: update karma config file
add npm-debug.log to .gitignore
test: use main grunt-karma package
Date.now() is faster than new Date().getTime()

http://jsperf.com/gettime-vs-now-0
Merge pull request #45 from ebidel/master

new Date().getTime() -> Date.now()
made script execution more specific to javascript
Merge pull request #46 from pennyfx/script-execution-fix

Script tag execution should be more specific to javascript
use build manifest
fix hanging semicolon
Merge pull request #49 from Polymer/master

7/11 master -> stable