Fixed an issue with password authorization when PPK key isn't available (bug appeared in 0.20.1)

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Style improvements. Cleanup.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Improved loggers. Updated README.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>