Created up-to-date version of apache site config, eliminated .htaccess (now have AllowOverride None to speed up the server), and setup puzzlebitch in mod_perl while -dev versions will still run as CGI.

Fixed admin-tools to use Config.pm's export_to_bash method (now just need to set PERL5LIB and if needed PB_DEV_VERSION before calling shell scripts in admin-tools).

Updated install instructions in README.md.
Merge branch 'master' of https://github.com/bigjimmy/puzzlebitch