Added some more patterns from some of the templates found here: https://github.com/github/gitignore
Merge pull request #246 from drewaburden/gitignoreAdditions

Added some more .gitignore patterns
Merge pull request #247 from drewaburden/AudioTweaks

Added a Range attribute to the musicVolume and sfxVolume variables in the SoundManager class
Made non-looping 3d SFX that are played through the SoundManager honor the sfxVolume