Filament Wall Mount and v2

Wall mount for filament spools. It's *just* long enough to hold three spools. I tested this for 7.5 pounds placed at the end using some weights and it didn't complain. Could probably carry more weight and could be optimized, I'm sure.

Inspired by blazejudo's "Filament wall mount v1.3", but about half an inch longer and it's much easier to print due to the arm being the same with as the base plate.

Haven't had any issues with v1, but a weak print of blazejudo's version failed after a few