Begin updating for exterior rendering room

Will add images, next priority is checking my formatting to make sure it works with existing CSS stylesheets
Minor enhancements here and there

Exploring existing docs, looking for areas to update. Will go over in
more detail and add features such as sonic screwdriver, more detail on
rendering room, etc. once my schedule lets up…
Moved PASSAGE and LONG rooms to their own little section, will update images (as necessary) and move more rooms (as necessary)
Found that version! (thanks eccentric :)
Merge pull request #7 from SilverEnderman/gh-pages

Some minor changes so far...