Installtion instructions

Currently the instructions demonstrate to install it in the root of the extensions folder, This goes against the de-facto standard for extensions to create a new folder in the extensions folder self-named after the extension to house their file(s).

This should be fixed in both the WikiPage as well as the extension file, I would have done this but I'm a bit busy and can't be bothered to setup git and all that atm to do the pull/pushes/merge requests atm.