updated readme

README.md

@@ -1,4 +1,21 @@
-# blag -- a simple, blog-aware static site generator
+# blag
+
+blag is a blog-aware, static site generator, written in Python.
+
+blag is named after [the blag of the webcomic xkcd][blagxkcd].
+
+[blagxkcd]: https://blog.xkcd.com
+
+## Features
+
+* Write content in [Markdown][]
+* Theming support using [Jinja2][] templates
+* Generation of Atom feeds for blog content
+* Fenced code blocks and syntax highlighting using [Pygments][]
+
+[markdown]: https://daringfireball.net/projects/markdown/
+[jinja2]: https://palletsprojects.com/p/jinja/
+[pygments]: https://pygments.org/
 
 ## Installation