tell the user when we're using an existing webgui user #10
update install docs in the README.md to indicate that the source install instructions need you to figure out on your own which system packages you need for your particular OS as
part of installing the required Perl modules.  also add mention of the new curses based installer script, and recommend using that instead.  also add mention of the WRE, the
old preferred method for setting up a wG, and mention that it's likely non-functional and patches are welcome.  maintaining the WRE proved to be too much work as it needed
to be rebuilt and re-uploaded to Sourceforge every time any of the packages used by wG got a security fix or started to get too old.