slightly more elaborate schedule

2010-05-24 Work begins. Starting on the Buf class. Using TDD all the way, so
           tests in the test suite will be an ongoing thing.
2010-06-07 Completed Buf class, including the constructors specified in S32,
           and indexing into Buf objects. Started on Str.encode and Buf.decode.
2010-06-21 Completed Str.encode/Buf.decode. Started on reading and writing
           binary files.
2010-07-12 Completed the first three deliverables: Buf class,
           Str.encode/Buf.decode, open binary files. Started on Buf operators.
2010-07-26 Completed Buf operators. Started on pack/unpack.
2010-08-09 Completed all deliverables.