printpdf 0.2.4

Rust library for writing PDF files
Documentation
# Changelog

## `0.2.4`

- Nothing changed, just a dependency update, because `rusttype` was yanked, so `printpdf 0.2.3`
  doesn't build anymore

## `0.2.3`

- printpdf now uses rusttype and does not require freetype anymore! There was an ugly 
  character-spacing hack that was fixed. You should now be able to build printpdf on windows 
  without further setup. 
- Millimeters and points are now strongly typed - instead of `f64`, you now must denote the
  scale with `Pt(f64)`, `Mm(f64)` or `Px(f64)`. The `mm_to_pt!` and `pt_to_mm!` macros have
  been dropped since you can now do true conversions between these types. The reason for this
  change was because this raw `f64`-based conversion bit me hard while using the library.
- The `Line` now has a different API and no `new()` function anymore. This is because
  `Line::new(true, false, true)` is less expressive than `Line { has_stroke: true, ... }`. 

## `0.2.2`

- SVG functionality was removed (commented out), because it didn't work in the first place
  and only increased build times. So there's no point in keeping functionality that nobody
  ever used, because it didn't work.
- Removed dependency on `num`
- `PdfDocument::save()` now only has a `T: Write` bound instead of `T: Write + Seek`.

## `0.2.1`

- The `document.save()` method now needs a `BufWriter`, to enforce buffered output (breaking change).
- The `PdfDocument` now implements `Clone`, so you can write one document to multiple outputs.
- You can disable the automatic embedding of an ICC profile by using a `CustomPdfConformance`.
  See `examples/no_icc.rs` for usage information.
- `set_outline_thickness` now accepts floating-point units