Version 181 - Fixes and touch up

New version contains:

• Proper fix for end game credits.  
• Some edge case test around movement.
• Changes to rendering of water, logic changes will improve the look of water in time.  Much to be done here.
• Fixes to water trail rendering floating above water in some scenarios.
• Map selection revised to be easier to understand what mission you are on.
• Various minor checks and updates to code.