V1.4.1: Controller Support + Fixes

Hello!

Helionaut can now be played with controller! There's also some more minor fixes and changes. 

Changelog:

• Added controller support. Simply press a button to switch from keyboard to controller.
• Fixed a bug where the robot would jump perpetually when looking for a weapon
• Removed needing plutonium to fix the radio
• Fixed a graphical glitch in the flags logo
• Fixed extra oxygen tanks not saving properly
• Decreased the HP at which the ship starts beeping by one
• (Hopefully) prevented some crashes!

Thanks for playing & have fun!

- rub