Editmode improvements, New level, bugfixes

• Edit Mode:
  • Trackpad UI visuals (much more intuitive this way)
  • delete only blocks after the current time
• Tracker Calibration: 
  • Hips align to player's IRL hip tracker height
  • Set rotation + room center
  • Visual on floor to indicate room center (for safety)
  • World scales based on player's height during calibration (for very short/tall players. Should result in all players having a similar experience)
• New level/song
• Lots of little bugfixes and usability improvements

Future TODO list:

• Better colorblind visuals (is it playable while colorblind now?)
• non-vive controller bindings
• More levels