Don't tar the full path of of MapGuide installation

[jng]

When we make the tarball for MapGuide Linux installers, we're packaging up the full path from /

We should be tar-ing everything from /usr/local/mapguideopensource-x.y.z to potentially allow for alternate installation paths

[jng]

Ticket retargeted after milestone closed

[jng]

Various config files in httpd/php include the full absolute path, so there is no real practical point to try for relative path packaging.

[jng]

Milestone renamed