r12 through r21

because the initial code was written for cse 152, i have had to clean up the directory structure and move functions around to their own files. matlab doesn't easily allow functions in one file to be called from another file. i actually wish i could just use java for this.

i also had to make some changes to accommodate windows. i am working with serge. he uses windows and mac. i might be able to do symlinks on windows, but i don't already know how. to be sure that it will work on his computer, i just made up a folder with repeated information. if only there were some way the file system were accessible like database instead of a hierarchy... anyways, it's difficult to make sure that this code will work on someone else's system.