refactor: Livereload configuration is a flag activated by attachServer()

This is no longer a configuration
fix: Use lrio.emit() in place of trigger()
refactor: Option minify in place of ‘compress’ (and simplify cssy.config() api)
feat: Add cssy.live() for automatic live reload
doc: Readme update with new sections
refactor: Cleanup and document cssy-browser api and add CssyBrowser.getImports()
doc: Add import and match option doc
doc: Update documentation (use docflux for doc generation)