Hex colors added

- Help messages is now editable on options.yml
- System chache clear added.
(BungeeMessages no save permanent data)

remaked!

- An error was solved.

System to filter messages.
New command "/filter".
New command "/bungeemessages reload".

- The Code has been improved.
- Permissions have been changed.

- Now those with messages disabled cannot send messages.
- Added "OTHERS.YOUR-MESSAGE-DISABLE" string in config.yml.

- The error which did not stop loading the plugin has been solved.