v0.9.2

This release is another mostly bugfix release:

• CLI: add -a option to copy assets (CSS, fonts) to the destination
• better parser error messages when parsing the preamble
• distinguish between inline- and block-environments (block envs force vertical mode, i.e. start a new paragraph)
• implemented continuing after a block-environment properly (LaTeX's \@endparenv)
• use (modified) svgdom instead of domino: CLI and tests can now render SVG!

misc:

• updated KaTeX
• added picture tests and screenshots