Hallowing case with visible leds

This is a modified version of the [Hallowing case](https://www.thingiverse.com/thing:3159362) that cuts holes for the onboard LEDs to be visible. Also leaves a hole for the speaker cable and battery cable. The size inside case is reduced to make a snug fit as battery will be outside of the case.

Screw holes have been adjusted from M2 to M2.5.

The back has more cut off to allow easier access to the on/off button.