Update web docs intro

Author: JayPanoz

docs/index.md

@@ -2,17 +2,18 @@
 
 Readium CSS is a set of reference stylesheets for EPUB Reading Systems, starting with Readium 2.
 
-Readium CSS provides: 
+Readium CSS provides styles for reflowable text: 
 
-- a CSS normalize for EPUB contents;
 - paged and scrolled views;
-- default styles;
-- reading modes (night, sepia, etc.);
+- a “patch” for HTML5 Suggested Rendering specific to publications (e.g. extra styles for hyphenation, breaks, etc.);
+- default styles for unstyled ebooks;
+- reading modes (day, night, and sepia);
 - themes;
 - user settings;
-- media overlays and user highlights.
+- media overlays and user highlights;
+- a set of baselines and recommendations for accessibility, overrides, and internationalization.
 
-**Readium CSS is currently in alpha** (version `1.0.0-alpha.1`).
+**Readium CSS is currently in alpha** (version `1.0.0-alpha.3`).
 
 ## Contents