Terrace - v0.3.0

New:

• Added sidebar with block queue
• Added swap feature (swap current block with top block in queue)

Changes:

• Set embed size to 600x800, rearranged sidebar and menus to match
• Added shift and ctrl keys; you can now play the game with one hand:
  • Right: Arrow keys, Enter, R. Shift, R. Ctrl
  • Left: WASD, Space, L. Shift, L. Ctrl