* INSTALL doc

 * catch EnvironmentError when writing sharefiles and clean up
 * try Duff's device in _addmul1()?
 * memory usage analysis
 * announce on lwn, p2p-hackers
 * compile with Microsoft compiler, etc.
 * test handling of filesystem exceptional conditions (tricky)

 * ansi89 patch from Greg Hazel
 * short input texts as per http://allmydata.org/trac/tahoe/changeset/1576
 * Jerasure
 * refactor exception raising like pycryptopp
 * check calling conventions like pycryptopp
 * check size_t usage like pycryptopp