svglover-1.1.0

Major work from @nasso, thanks!

• Add support for the following elements: <path>, <use> and <polyline>.
• Add support for the following attributes: href, xlink:href, d, viewBox, (stroke|fill)-opacity.
• Add support for many more color formats.
• Improved support for the transform attribute.
• Improved support for opacity-related attributes.
• Various XML parsing improvements.
• Removed tableshow.lua - I don't know why it was there but I'm pretty sure it isn't needed for svglover to work since it wasn't used at all.
• Changed the demo code to show all the new features.
• Some bug fixes.