Added a bubble spawn to all fish.

All handled within CFish using the variable mBubbleTimer.  The default constructor defaults this value to 0-5 inclusive.  The Update function tests against fish pixel height (determined each fish height is unique) to determine type of fish and does a check for so many seconds having passed.  Can add some more variability here if desired but it's pretty cool as is.  Supports cntl click to copy as well.

WARNING: Did experience some form of a seg fault after mass cntl click copying all the types of fish.  The feed timer went up and all the fish died.  I clicked on a few bubbles and it seg faulted.  Tried to reproduce but couldn't.  Not sure why it seg faulted.