changed preprocess to return number of bits in original file
fixed some errors; decompressing works but doesn't stop at end of text
fixed problem with compression
completed compression and uncompression in SimpleHuffProcessor--works on test cases (gopher and melville)
removed some debugging print stmts
added proper return statements to preprocess, compress, and uncompress
added exceptions for robustness (break on non-huffed files, force compression)
added readme
cleaned up code organization somewhat
started assignment 7 writeup