forgot to install dvipng on lgcm... let's see if this works :)

doc/install.txt

@@ -18,7 +18,7 @@ to be installed:
 - numpy >=1.2 (earlier versions have memory leaks)
 - SciPy (specifically numpy, sparse, weave). We recommend scipy >=0.7 if you are using sparse matrices, because scipy.sparse is buggy in 0.6. (scipy.csc_matrix dot has a bug with singleton dimensions. There may be more bugs.)
 - g++, python-dev (optional but highly recommended, to compile generated C code)
-- sphinx >=0.5.1, pygments (optional, to build documentation)
+- sphinx >=0.5.1, pygments (optional, to build documentation) (also latex and dvipng if you want math to show up as images...)
 - mercurial (optional, to download the source)
 - nose (nosetests) (optional, for testing)
 
@@ -134,3 +134,19 @@ As of now, the Windows platform is not supported. In fact, it has
 never even been tested, so feel free to explore this uncharted
 territory and inform us of your progress!
 
+
+----------------------------
+Generating the documentation
+----------------------------
+
+This should give you the gist of it:
+
+.. code-block:: bash
+
+   $ python scripts/docgen.py --help
+   Usage: scripts/docgen.py [OPTIONS]
+     -o <dir>: output the html files in the specified dir
+     --rst: only compile the doc (requires sphinx)
+     --epydoc: only compile the api documentation (requires epydoc)
+     --help: this help
+