#28 quick install doc talks about copying php folder

[Steven A. DuChene]

The quick install doc talks about:

To install the MyPBS Web Tools copy the contents php
folder (available in CVS or the pre-packaged release)
into a subfolder in your HTML root directory.

This should instead talk about copying the contents of
the "frontend" folder instead.

Even better would be a frontend install script that
would do this after asking where the php web files
should be placed.