slosh 0.1.3

• web: the released version in the hero, linking to the release
• web: contributing section, shorter
• web: a contributing section -- the github and the discord
• gen-docs: the page title separator is a middle dot
• docs: sweep the em dashes
• web: no em dashes on the landing page
• web: the sessions step mentions shared attach
• themes: pin the attach tag to each palette's muted chrome tone
• attach tag: just the count, in theme colours
• web: chore
• multi-attach: say who else is watching, and where you are
• Merge branch 'multiplayer': shared multi-client attach
• multi-attach: the config knobs
• Add competitive multiplayer support.
• webdemo: version from contrib/version, published by ship
• shaders: remove the .so plugin loader
• web: the real site is the only site, and web/publish ships it
• web: chore
• web: deprecate install.sh and the served dist/
• contrib/ship: the whole release as one resumable command
• install: source tab clones from github
• install: key enrollment commands right in the pacman tab
• public links: point at github.com/sl0p-foo/slosh instead of cgit
• install tabs: macOS / linux / source
• install: drop install.sh, point at GitHub releases for binaries
• brew: pin formula to v0.1.2