v0.43.4 Development Release

• Issue #58: Right-click > Left/Right Torso > Add to Left/Right Torso for targeting computer makes it use only one crit slot
• Issue #63: Double Heat Sinks are allowing "doubling up" on Super Heavy Mechs
• Issue #70: Updated project URL on the About dialog.
• Issue #52: Gyro switching and validation
• Issue #66: Jumpjets on Vehicles greyout out on loading (0.43.3)
• Feature: LAM construction rules.
• Fixed issue setting fluff image on tanks
• PR #79: IOTech
  o Updates all tech intro dates to the Universal Technology Advancement Table in Interstellar Operations.
  o New configuration options for filtering construction options by tech level in a given year or
  by faction availability.
  o Rewrote structure tab code to implement consistent filtering of options by intro year and tech level.
  Some minor layout changes.
• PR #80: BA Quad turrets