Adds clarifying error message to failed bus for issue #20.
Adds key import feature.  Resolves #15.

Allows the option to clone the data zone from another device if the file
is specified with the -f option.  Currently the configuration zone is
not cloned, just the data zone.
Copies the response byte.  Resolves issue #24.
Always updates the seed.  Resolves issue #30.
Adds check-mac documentation.  Resolves #22.
Bumps version.
Updates test to use -b option.
Updated NEWS for release.
Updates test to use a file that is available during make distcheck.
libgcrypt is now required to build.
Updates github documeation.
Updates ChangeLog.