Update to Wiki

[sgillen]

Hello, I've updated the wiki slightly to include information about the Prusa printers and the machine shop. I can't open a pull request for the Wiki so I've opened this issue instead.

Machine-Shop.md (Replaces Bridgeport-Mill.md)

# Machine Shop
We have a machine shop, it contains:

- CF3 22HP CNC (which can be run on request).
- An Atlas lathe
- Bridgeport series I 2hp mill
- Central machinery 30'' shear press 
- Central machinery band saw 
- Craftsman 12'' band saw 
- Drill press
- Assorted bench grinders
- Assorted hand tools

3D-printers.md

# 3D Printers

The Hackerspace has several 3D printers:
* Mendel Max 2 - unknown operational state
* Ultimaker 2 - Up and running
* Peopoly Moai - Up and running
* ZCorp Zprinter 310 - Tested, needs binder
* Prusa i3 Original - 2 Printers up and running

## Ultimaker 2
The Ultimaker 2 uses 1.75mm filament. It can be accessed at ultimaker.internal.sbhackerspace.com and runs octoprint to handle slicing and printing. Octoprint requires a log in using your SBHX credentials. 

## Peopoly Moai
The Peopoly Moai is an SLA printer and uses a UV cure resin to print. Please send any files for printing to info@sbhackerspace.com and they will be printed on Saturdays. 

## Prusa I3
The Prusa I3 uses 1.75mm filament. It can be accessed on the SBHX network at: http://i3.internal.sbhackerspace.com and runs octoprint to handle slicing and printing. Octoprint requires a log in using your SBHX credentials.