Star Explorers Testing Branch Updated to Pre-Release Version 0.4.0

[h3]A bug was found in the most recent build:[/h3]

• Entering a cave or ruin and destroying a barrier, would incorrectly write into the storage file, causing the game to crash when trying to re-enter the same location.
  
• This should no longer happen, but if a cave was corrupted in this way already, it will not fix the issue for that location.
  

[h3]New UI Feature[/h3]

• Number keys 1-4 will now switch between equipped weapons/scanner
  
• Scanner is assigned to 1, and weapons are 2-4
  
• Tested on planet surfaces and in caves/ruins, seems to work