Changes and fixes

New features:

- Refesh rate now selectable from main manu (Non HTML5 versions)
  o Options: Automatic, 50Hz, 60Hz

• A         automatic syncs to windows main display refesh rate
• 50Hz Original Amiga refeshrate, collision modeling is as close to original as possible
• 60Hz Optimal balance between new and old worlds

- Version tracking with a release version numbering latest is now v1.50, previous version v1.35

Adjustments: 

- Bomb number 6 (mines) timeout lenghtened by a lot - also "the bounce" fine tuned to more like it used to be on the Amiga

- Pulse cannon reload fastened by a small margin to be closer the original

- Spead of the spray (pulse cannon mode 2) widened to be more inline with retro style 

Fixes: 

- Resolution changes should no longer cause UI defects