Border Pawtrol v0.5.1

Border Pawtrol v0.5.1 patch notes:

• Changed default Bark button to Shift to avoid unintentionally closing the browser tab when barking while holding Up.
• Fixed a bug where Wally would sometimes teleport after completing a fence on low FPS
• Fixed a bug which reduced Wally's velocity if two direction buttons were pressed at the same time.
• Added a chicken to the middle of 4-1.
• Change FPS cap to 80 to reduce judder on Firefox.