Merge pull request #324 from Yahkob/optimization

optimization(grunt,index): add jQuery CDN add uglify
Update index.html
bugFix(boardTileAssets): error in assets
bugFix(public): fix game tip, change assets to single quotes
Merge pull request #325 from Yahkob/bugfix

bugFix(public): fix game tip, change assets to single quotes
optimization(index.html): change underscore to lodash