SplitCut OpenSCAD Library

# Introduction
I got inspired by the [PuzzleCut OpenSCAD Library](https://www.thingiverse.com/thing:35834), when I tried to split a large print.
But I disliked the library interface, so I wrote a new one.

# Example
Here is the split_demo.scad:
```openscad
use


// Puzzle pieces can have "tabs" and "slots", "loops" and "sockets", "knobs" and "holes", "keys" and "locks"
split(
translation=[5,5,0], // Translation of the dividing plane
rotation=[0,0,70], // Rotation of the dividing plane
tab_locations=[-10, 7], // position of the tabs along the dividing plane
tab_size=5, // width of the tabs
tolerance=0.3, // Distance between parts
part="both" // Output "both", "male" or "female" part
)
import("OctopusThickLegs.stl");
```

Demo object: [Bucket O' Octopodes (thicker legs)](http://www.thingiverse.com/thing:8896)