clarified goals
added __PWD_DB_FILE_MISSING__ when password store is not available
added list for autotesting later
updating readme for missing pwd.db instance
clarified the option -s when not stated defaults to get password
improved get_KF_SIG function to check if  exist before getting cipher text
check KF_SIG always on get_password
fixed issue on user_found
fixed issue on users with similar first few characters
simplified reading password
unified most of set_password into one function
simplified prompt+read answer in change password
made checking of binaries & KEY_FILE in a function + moved usage to common.sh.lib
restructured set_password
updated readme and remoted default database for usage simpicity
removed unused function