ignore pyc files
added cleanup script to delete pyc files.
Implemented read_file function.
Implemented write_file and a function to test it.
Added comments stating what I've done so far.
Ignore write_file.py output file.
Didn't need to test return value of write_file.
read_file will now raise Exception in the event of an IOError or the like.
Added comments.
Ignore cleanup script.