Sound/Jumping

Added sound effects
Jumping control tuning
hydration upon death
Merge remote-tracking branch 'origin/master' into Sound
Combines shots and fireballs into one list.
Refactors enemy class into abstract class and example enemy.
Merge pull request #11 from rliebz/onelist

Combines shots and fireballs into one list.
Merge pull request #12 from rliebz/onelist

Refactors enemy class into abstract class and example enemy.
Update README.md
Update README.md
Renames physics as level.
Merge branch 'master' of https://github.com/rliebz/Puddle
In game music, shot/powerup sound effects
Balanced jump sound
Adds music, sound effects, and general bug fixes.
Merge pull request #13 from rliebz/Sound

Sound
Minor code cleanups.
Merges with Sound.
Moved sound files to Sounds folder
Merges with Sound.
Minor code improvements.
Add pipe mechanics and end pipes