Merge pull request #50 from IagoLast/master

Big Refactor.
Selected the music.
Put music into levels. Also made the enemies start attacking only when
they're really close. This way, the effective delay is not random and
you have a chance to defend yourself.
Merge pull request #51 from dgalaktionov/master

Added music to the levels
Added weapon sounds.
Merge pull request #52 from dgalaktionov/master

Added weapon sounds
Added wolf bite sound
Now the weapons change depending on the level, and you can switch them
with the right click
Merge pull request #53 from dgalaktionov/master

All weapons are in-game now
fixed name bugs. (again -.-)