Business card holder

**Business card holder** is a modification of my original Desktop Nameplate
https://www.thingiverse.com/thing:162367
and Desktop Nameplate for single or dual extrusion
https://www.thingiverse.com/thing:256837

**Features**
1) The business card holder is an optional addition to the desktop namplate.

2) Choice of Google fonts: Anton, Archivo Black, Baloo, BreeSerif-Regular, Courgette, FrancoisOne-Regular, Montserrat, and Roboto-Black

3) The nameplate volume is slightly increased (affec