Glossary added

I added a new page, a little baby glossary of technical and not-so-technical[-but-still-sort-of-technical] words. Hopefully it’ll grow soon. Check it out!

EDIT: I decided that it’s not such a good idea to make my own glossary. Whatever I make would be epic fail compared to all the great sources of technical definitions out there. But I did add a glossary link to the sidebar. What would be even nicer would be a search bar, but I don’t think that’s possible.