trim animation length

[PeterBreen]

burp animation takes toooooooooo long.

Trim the burpfish.gif down to a much shorter cycle, then change timeout and debounce times appropriately. Specifically,
Dopefish.js line 15:
this.handleFishClick = _.debounce(this.handleFishClick.bind(this),6000, { 'leading': true });
and line 36-38:

    setTimeout(() => {
      this.setMoveInterval(20);
    }, 6000);

change 6000 to new gif animation length, in milliseconds.