print-site v0.3

Improvements

• Refactored plugin to avoid print page being processed by other plugins. 86531d2 and closes #8 and #9
• Replaced warnings.warn with logging.warning() for better printing of warnings e4d611a
• Remove box shadow around tables when using mkdocs-material theme for prettier printing dca7a41
• Fix top padding in print-site box in mkdocs theme 663c267
• Compatibility with mkdocs-material dark mode. Now switches to light mode on the print page. 05820b8