v0.21

Fix 'keep': original file was always kept

v0.2

Added '-k' (keep input files) and '-N' (save input file name).
Minor bug fixes.

Initial release

Usage: mzpq [-1..9] [-cdfhV] [-m method] [files]

-1..9 compression level
-c write to standard output
-d decompress
-f force overwrite of output file
-h this help
-m compression method, see libzpaq.h for details
-V version