update readme for atutor.github.io

readme

@@ -1,22 +1,32 @@
 ATutor readme:
 
-To install ATutor simply point your browser to your installation and follow the provided instructions.
+To install ATutor, point your web browser to the installation directory where ATutor was extracted, and follow the Installer's instructions.
+e.g. http://localhost/ATutor
 
-For additional installation details see:
+For full installation instructions see:
 https://atutor.github.io/atutor/docs/installation
 
-Installing from a GitHub Clone
-1. If you are installing ATutor from a GitHub clone, rather than an ATutor bundled distribution, follow the usual installation and upgrade instructions at the link above.
-2. Before running the Installer, you will need to create an empty config file. To create the file, from the ATutor base directory, issue the command 
+Installing from a Github Clone (assuming you know Github)
+
+1. Fork ATutor into your own Github account, at:
+https://github.com/atutor/ATutor
+
+2. Clone ATutor from the fork you created into the document root of your webserver (for convenience), with:
+git clone https://github.com/yourname/ATutor.git
+
+3.  Before running the Installer, create an empty config.inc.php file in the ATutor/include/ directory. If you have a command line to work from, while located in the ATutor directory, create the file with: 
+
 touch include/config.inc.php
-3. Then follow the instruction given by the Installer.
 
-GitHub Basics
-If you wish to have code you've developed added to the ATutor public source code, you will need to understand a few Git basics.
+4. Follow the installation instructions at the link above.
+
+5. Or, follow the instructions given by the ATutor Installer.
 
+GitHub Basics
+If you want to contribute to ATutor, a few Git basics will describe how.
 See: https://atutor.github.io/atutor/docs/dev_with_github.html
 
-Or, see the ATutor Handbook:
+For additional ATutor documentation, see the ATutor Handbook in ATutor, or at the following links:
 
 Administrators
 https://atutor.github.io/atutor/handbook/admin.html