Minor fixes to typos and other formatting, better wording

[grunt22fox]

Original pull request text from #188:

I made multiple changes to improve grammar and capitalization.
The best advice I can give is to be more concise with instructions. While the guide has some very good information, parts of it are wordy or not written very well.
Considering that most people who mod Wiis might be in their teenage years, I think that they might find these instructions to be too complicated because of the amount of information.
It's also hard to read some of the sections on the page because they are either hard to differentiate from each other or have too many images.
Try to keep the instructions simple to the point where less tech savvy people can follow along easily

Many of the PR changes are good, however the original PR has been inactive for 2 months and may not be edited again. This PR makes edits and improvements to the original changes.