v0.2

Full Changelog: v0.1...v0.2

I've fixed a few bugs and updated a few things:

Major updates and breaking changes

• The figure size is now specified more generally as a width and aspect ratio, as the previous method was not so general. I've also moved figure sizing to postplot so that with multiple calls to postplot, you can export a figure multiple times in multiple sizes.
• sharex and sharey now have a simpler logic and have moved to preplot to accommodate this. Furthermore, the linkaxes option has been removed because it was confusing with sharex/y.

Minor updates

• Can also export as SVG (which is not possible with exportgraphics)
• Specifying lineWidth also sets the line width of other data representing objects such as patches and scatter plots.