Event delegation ftw
Avoiding error when enemy moves and the image is not rendered yet. Fixes #36
Fixed calc of start angle
Removed need for extra layout for the game.

Also added auth component to all pages.
Fixed enemy center calculation

I have no idea why I included the initial angle in the calc.
Fixes #32
Fixed attack to be center to center
Version bump to 0.0.2.
Added Newrelic monitoring capability.
Removed private requirement from package.json.
Updated package name.
Making the enemies point to the player center
Bumped version to 0.0.3.
Added sound effects. Refs #35
Switched to use Howler library
Replaced sounds.

Added enemy death sound and suppressed multiple instances of its
playback.
Added mute button
Changed mute word to icon symbol.
Added confirm for strategy reset.
Fixed typo
Enemies psd and swarmer