v0.90

This release incorporates audio sources and listeners for the extra credit portion of the assignment. However, it requires static libraries to compile and dynamic libraries to run. The appropriate Windows and Linux files are attached.

Instructions for Windows:
--Copy OpenAL32.dll and libalut.dll to the root of the repository
--Copy libOpenAL32.dll.a and libalut.dll.a to the lib folder
--Copy engine.wav and storm.wav to the input folder

Instructions for Linux:
--Copy libopenal.so, libalut.so.0, and libalut.so (just a symlink to libalut.so.0) to the lib folder
--Copy engine.wav and storm.wav to the input folder
--Edit the library shell variable (export LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH)