integrated quickstart into installation and building pages. Wrote

installation stuff.

running.rst

@@ -1,3 +1,24 @@
 ======================
 Running the Overviewer
 ======================
+
+Rendering your First Map
+========================
+
+Overviewer is a command-line application, and so it needs to be run from the command line. If you installed Overviewer from a package manager, the command is ``overviewer.py``. If you downloaded it manually, open a terminal window and navigate to wherever you downloaded Overviewer. For pre-compiled Windows builds, the command is ``overviewer.exe``. For other systems, it's ``./overviewer.py``.
+
+To generate your map, run::
+
+    overviewer.exe WorldName path\to\output\                 # on windows, or
+    ./overviewer.py WorldName path/to/output/                 # on other systems
+
+where ``WorldName`` is the name of the world you want to render, and
+``path/to/output`` is the place where you want to store the rendered world. The
+first render can take a while, depending on the size of your world. You can, if
+you want to, provide a path to the world you want to render, instead of
+providing a world name and having Overviewer auto-discover the world path.
+
+When the render is done, open up *index.html* using your web-browser of choice. Pretty cool, huh? You can even upload this map to a web server to share with others! Simply upload the entire folder to a web server and point your users to index.html!
+
+Incremental updates are just as easy, and a lot faster. If you go and change something inside your world, run the command again and Overviewer will automatically rerender only what's needed.
+