added ping sound when ball hits brick
each row of brick now has its own note/sound when hit
added sound effects to ball hit paddle and powerups
added game over sound
refactored loading and adding audio
players can hear brick hit sounds from other players
added audio files
Refactor audio code in client
Merge branch 'master' into sound-effects

* master: (27 commits)
  Add successful save
  Query db for only name and score fields
  Minor fixes
  Refactor client
  Refactor server high scores code
  Refactor server high scores code
  Add Heroku Mongo code
  Remove db folder
  updates scores after save
  scrolling marquee
  added styling to high scores
  top 10 scores loaded into #high-scores div
  added html structure and css styles to high scores div
  removed typeof check
  accounted for undefined scores attribute
  server sucessfully sends top 10 scores
  seeded with 11 players, server retrieves top 10
  loads scores in descending order
  server retrieves scores onNewPlayer
  scores persist to db
  ...

Conflicts:
	public/js/game.js
	server.js
Merge pull request #79 from nsue/sound-effects

Sound effects