topopt 0.1.0

Topology optimization, based on TopOpt99
Documentation 
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# About
This package performs 2-dimensional topology optimization and is a port of ["A 99 line topology optimization code written in Matlab"](https://www.topopt.mek.dtu.dk/apps-and-software/a-99-line-topology-optimization-code-written-in-matlab).

# Usage
Usage follows exactly the same format as the original topology optimization code:
```rust
let nelx = 30;
let nely = 10;
let volfrac = 0.5;
let penalty = 3.0;
let rmin = 1.5;
let x = topopt::top(nelx, nely, volfrac, penalty, rmin);
```