Update for git; start adding out-of-lab instructions.

doc/installation.rst

@@ -1,13 +1,39 @@
 Installation
 ************
 
+.. _install_lab:
+
+In the Sali lab
+===============
+
 There is no need for most users to install the web framework. It is already
 installed for you by our sysadmins on the 'modbase' server machine.
 
 Sysadmins: if you do need to make modifications to the framework itself,
-this can be done by checking out the Subversion repository at
-https://svn.salilab.org/saliweb/trunk to a directory on modbase, making your
+this can be done by cloning the git repository at
+https://github.com/salilab/saliweb to a directory on modbase, making your
 changes, writing test cases to exercise those changes, running 'scons test'
-to make sure the changes didn't break anything, 'svn ci' to commit the changes,
-then running 'sudo scons install' to update the installed version of
-the framework.
+to make sure the changes didn't break anything, 'git commit' and 'git push'
+to commit the changes, then running 'sudo scons install' to update the
+installed version of the framework.
+
+.. _outside_lab:
+
+Outside of the Sali lab
+=======================
+
+The framework is designed to work in the Sali lab environment, but can be
+used in other environments with some modification.
+
+Prerequisites
+-------------
+
+* SGE
+
+* DRMAA Python bindings
+
+* Web server (e.g. Apache)
+
+* Filesystems (local, NFS)
+
+* MySQL database