Handled Wrong Commands - SQL Connection - Changed onCommand - new Version Command

- Handled all(i think) wrong commands (more args then needed... Etc...)
- Now when the plugin can't connect to the database it's disables itself
(temporary, while we don't have another system for saving data)
- Changed Commands hashMap to <String(name), StexCommand>
- Added version command, (also the default when missing args(agreed?)
- Added permissions check at every command.
- Organized some imports.