add -v to output version info
exit with error when too many arguments are present
remove 'dist' target from Makefile
fix trailing space on output
refuse to emit an empty passphrase
wrap README.md at 80 chars
shorten 'wordlist_max' to 'max_words'
bump version in config.mk
throw error on empty input
don't truncate lines without a newline
reduce memory usage

only allocate the memory needed to store a word to reduce
the amount of wasted memory
fix inconsistent style
change README to markdown
modify usage to match manpage
initial commit