v.1.0.1

Hi folks :)
A small update cooked up from some of your feedback is here:

• Ability to zoom in/out with keyboard (by default R, F)
  
• Prevent the player from building pipe bridges over in/out pipe
  
• Detailed info on why the job can't be executed
  
• Attempt at fixing Dropped Items not being picked up
  
• UI tweaks