DevDocs corrections part 1

Started reviewing the developer docs, finding lots of things to correct. I'll do more later, but please review this batch first so I know what, if anything, needs to be fixed moving forward - I'm not entirely sure on the markdownish format used.
I don't regularly read the board anymore, so I honestly can't state for certain. The few times I've seen posts there in the last few months, that did appear to be the case, however.