Updated to 1.4 (Post-Jam release)

I had fun working on this so I pushed a bunch of updates since the jam.

• Stations start bigger and some centers are 90* rotated.
• Stations parts sometimes drop resources when destroyed.
• Station explosions are red if they do damage.
• Station explosions damage over time rather than once.
• Station corners are smoothed and easier to fly between.
• More readable UI.
• More visual tutorial.
• Added Music.
• Bug fixes.