Clean up some member variables
Add CheckException class
Add ICommandCheck interface
Add PermissionCheck class
Implement ICommandCheck in AbstractExecutor
Implement command checks in all executor classes
Add ArgumentCountCheck class
Use ArgumentCountCheck class wherever possible
Add addCheck method to AbstractExectutor
Move event type check into doCheck method for command executors
Add colors to MessageBundle.properties
Remove getError method
Apply color and format codes to command error messages
Rename Strings class to R and make its members static
Fix wrong resource bundle name
Update permissions in plugin.yml
Add warning messages for stripping format and color codes
Add warning color
Add detection and stripping methods for colors and formats
Add checks for colors and format codes