Update README and convert to Markdown syntax

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

README.md

@@ -0,0 +1,40 @@
+aurweb
+======
+
+aurweb is a hosting platform for the Arch User Repository (AUR), a collection
+of packaging scripts that are created and submitted by the Arch Linux
+community. The scripts contained in the repository can be built using `makepkg`
+and installed using the Arch Linux package manager `pacman`.
+
+The aurweb project includes
+
+* A web interface to search for packaging scripts and display package details.
+* A SSH/Git interface to submit and update packages and package meta data.
+* Community features such as comments, votes, package flagging and requests.
+* Editing/deletion of packages and accounts by Trusted Users and Developers.
+* Area for Trusted Users to post AUR-related proposals and vote on them.
+
+Directory Layout
+----------------
+
+* `aurweb`: aurweb Python modules, Git interface and maintenance scripts
+* `conf`: configuration and configuration templates
+* `doc`: project documentation
+* `po`: translation files for strings in the aurweb interface
+* `schema`: schema for the SQL database
+* `test`: test suite and test cases
+* `upgrading`: instructions for upgrading setups from one release to another
+* `web`: web interface for the AUR
+
+Links
+-----
+
+* The repository is hosted at git://git.archlinux.org/aurweb.git -- see
+  doc/CodingGuidelines for information on the patch submission process.
+
+* Bugs can (and should) be submitted to the aurweb bug tracker:
+  https://bugs.archlinux.org/index.php?project=2
+
+* Questions, comments, and patches related to aurweb can be sent to the AUR
+  development mailing list: aur-dev@archlinux.org -- mailing list archives:
+  https://mailman.archlinux.org/mailman/listinfo/aur-dev