Removed redundant glError? from Map class and renamed CommonMethods#glError? to #gl_error?, added debug settings for disabling shaders and whether to exit on opengl error

lib/ui/commands/debug_command.rb

@@ -17,11 +17,15 @@ class IMICFPS
         set(:stats, false)
         set(:fps, false)
         set(:skydome, true)
+        set(:use_shaders, true)
+        set(:opengl_error_panic, false)
 
         subcommand(:boundingboxes, :boolean)
         subcommand(:wireframe, :boolean)
         subcommand(:stats, :boolean)
         subcommand(:skydome, :boolean)
+        subcommand(:use_shaders, :boolean)
+        subcommand(:opengl_error_panic, :boolean)
       end
 
       def handle(arguments, console)
@@ -33,4 +37,4 @@ class IMICFPS
       end
     end
   end
-end
+end