Fix Images sized with Percentage

SVG images that have a size in % unit failed to size correctly.

<svg width="100%" height="100%" viewBox="0 0 500 500">

Width should be 500px not 100px.

P3 Color

display-p3 color is now correctly supported.

e.g.
fill-color="color(display-p3 0 1 1)"

Swift Code Generation

Adds swift code generation to command line tool.

Swift 5.4

Adds public method to create Image from Data

Swift 5.4

Fixes iOS compatibility in Package.swift
Binary is built with Xcode 12.5

Gradient UserSpaceOnUse

Adds support for gradients that are define within userSpaceOnUse . Previously objectBoundingBox was only supported.

Small fix for Paths that begin with M ## ## ## ## whereby SVGs should interpret this as M ## ## L ## ##.

Referenced Gradients

Includes localised fix for referenced gradients

v0.7.1 Swift 5.2

Updated for compatibility with Swift 5.2

v0.7.0 CommandLineTool Size

Adds support for custom images sizes and scales within the command line tool
% swiftdraw sample.svg --format pdf --size 48x48

v0.6.0 PDF Transparency Masks

Adds support for creating PDF images with SVGs what include transparency masks. This is achieved by using a rendered greyscale image mask so PDF file size is increased while the quality is reduced compared to native Core Graphics transparency layers.