'Menu' button toggles right sidebar

Now the 'Menu' button will toggle the right sidebar by either sliding it
in from the right or out to the left.

I've also made some bug fixes and changed a little bit of my HTML and CSS.
I remember moving some links to scripts to the end of the <body> for
standards compliance, and I may or may not have done other stuff (I can't
remember).

Made with <3 by Alexander.
Merge branch 'master' of https://github.com/Arcrammer/Haus-of-Alexander