Improved README.

README.md

@@ -1,32 +1,46 @@
-CommonMark
-==========
+cmark
+=====
 
-CommonMark is a rationalized version of Markdown syntax,
-with a [spec][the spec] and BSD-licensed reference
-implementations in C and JavaScript.
+`cmark` is the C reference implementation of [CommonMark], a
+rationalized version of Markdown syntax with a [spec][the spec].
+(For the JavaScript reference implementation, see
+[commonmark.js].)
 
-[Try it now!](http://try.commonmark.org/)
-
-For more information, see <http://commonmark.org>.
-
-This repository contains the C reference implementation.
 It provides a shared library (`libcmark`) with functions for parsing
 CommonMark documents to an abstract syntax tree (AST), manipulating
 the AST, and rendering the document to HTML, groff man,
 CommonMark, or an XML representation of the AST.  It also provides a
 command-line program (`cmark`) for parsing and rendering CommonMark
 documents.
 
-The library and program are written in standard C99 and have
-no library dependencies. The parser is very fast, on par with
-[sundown]:  see the [benchmarks].
+Advantages of this library:
+
+- **Portable.**  The library and program are written in standard
+  C99 and have no external dependencies.  It has been tested with
+  MSVC, gcc, tcc, and clang.
+
+- **Fast.** Performance is on par with the fastest existing
+  Markdown parser, [sundown]:  see the [benchmarks].
+
+- **Accurate.** The library passes all CommonMark conformance tests.
+
+- **Robust.** The library has been extensively fuzz-tested using
+  american fuzzy lop.  The test suite includes pathological cases
+  that bring many other Markdown parsers to a crawl (for example,
+  thousands-deep nested bracketed text or block quotes).
+
+- **Flexible.** CommonMark input is parsed to an AST which can be
+  manipulated programatically prior to rendering.
+
+- **Multiple renderers.**  Output in HTML, groff man, CommonMark,
+  and a custom XML format is supported. And it is easy to write new
+  renderers to support other formats.
+
+- **Free.** BSD2-licensed.
 
 It is easy to use `libcmark` in python, lua, ruby, and other dynamic
 languages: see the `wrappers/` subdirectory for some simple examples.
 
-[sundown]: https://github.com/vmg/sundown
-[benchmarks]: benchmarks.md
-[the spec]: http://spec.commonmark.org
 
 Installing
 ----------
@@ -132,5 +146,10 @@ eliminating several worst-case performance issues.
 Nick Wellnhofer contributed many improvements, including
 most of the C library's API and its test harness.
 
+[sundown]: https://github.com/vmg/sundown
+[benchmarks]: benchmarks.md
+[the spec]: http://spec.commonmark.org
+[CommonMark]: http://commonmark.org
 [cmake]: http://www.cmake.org/download/
 [re2c]: http://re2c.org
+[commonmark.js]: https://github.com/jgm/commonmark.js