v2.0.0

Major Changes

• .u- and .a- prefixes are OBSOLETE. use only the hyphen prefix .- from now on. for example: class="-bc-s03".
• the minified file lux-nox.min.css is no longer available. Use lux-nox.css instead: it is already minified and has a sourcemap.

Fixes

• fix readme (wrong repo reference)
• minor docs fixes