Upate 0.6.1.6b

• All boss soundtracks are now used for the gatekeeper fights and are now randomised and do not switch on scene change.
  
• Improved the look of the new main menu.
  

• Energy regeneration and endurance regeneration from the legacy tree (Tree of Light) have been increased to +15% (was 5%).
  

This coupled with the latest balance changes for regeneration should give the legacy progression more weight, especially on the early/mid game. Altogether this should bring more build possibilities for the early/mid game by providing more resource regeneration for fewer nodes while also allowing us to better balance the endgame experience.