Particle Electron Breadboard Box

This is a derivative of my original [Breadboard Project Box](http://www.thingiverse.com/thing:930427) with a few key modifications:
- Removed battery holding area
- Added side "channels" to hold cellular antenna
- Corner channels for battery wires

This box holds a half-size breadboard with a [Particle Electron](https://store.particle.io/#electron) on top and has enough room below to hold the battery, a short micro USB cable, and some jumper wires. Everything you need to help make your project more mobile since you can now work on it anywhere that has cellular reception!