Hide Class Bar, Pet Bar and Gryphons

Version 1.2:
Added a command list for hiding and showing the bar.
Use either /classbar, /cb, /hsb or /hideshapeshiftbar
Available commands:

• show - Shows the class bar
  
• hide - Hides the class bar
  
• help - Shows available commands
  
• status - Shows the current visibility of the class bar
  

Version 1.0:
Hides the druids shapeshifte bar, the warriors stance bar, the roues stealth and tha paladins aura bar.