Demo 1.1.1 patch note

Hello everyone, while testing the build we found a few bugs that have been fixed:

• Crash when the invaders reach research level 3 has been fixed. There are no enemy pods of that level, so the demo will use a not already chosen research level 2 pod.
  
• Fixed crash when dwarf arbalest gets researched for the invaders.
  
• Added an objective after all the objective has been completed in the demo to state that, and to warn the player of the upcoming demo ending base attack.