Floor stand with symbol

Based on [Floor stand](https://www.thingiverse.com/thing:3396119). You can customize a text and symbol on the stand.

When inputing a text, lines are separated by spaces. Non-English characters requires fonts that support your language. Download and edit the .scad file. After that, use [OpenSCAD](http://www.openscad.org) to render and export the STL.

Change `joint_spacing` when having difficulty in rotating the joint.