Returns true if this entity has some velocity
Takes a boolean parameter, where if true, the y velocity is ignored
  overload 1:
                        
user:isMoving()  
  | Method Property | Fluent Description | Representation | 
|---|
 | Return Value | a Boolean |  | 
 
  overload 2:
                        
user:isMoving(ignoreY)  
  | Method Property | Fluent Description | Representation | 
|---|
 | ignoreY accepts | a Boolean |  | 
| Return Value | a Boolean |  |