Added meta version info to cli; to allow info like beta to be included in version string.
Initial implementation of edit command.
Added edit command to supported commands; stubbed out new safeword_credential_edit().
Refactored safeword_credential_info to populate struct with info instead of print to stdout.
Added edit command to bash completion script.
Implemented safeword_credential_free to free safeword_credential's memory.
Renamed safeword_credential_edit to safeword_credential_update. Initial implementation of safeword_credential_update.
Renamed safeword_tag_credential to safeword_credential_tag.
safeword_credential_update now adds the username and/or password if they do not exist in the database. Commented out code trying to open text editor for editing until I figure out how to do it properly.