General wiki documentation update

[ZaLiTHkA]

As per a previous discussion, I finally found some time this evening to go through the wiki and make a few improvements to the pages. :)

@bennyn, Github treats the wiki pages as their own git repo, so forking the code repo doesn't include wiki pages.. They do store their own page change history though, so any changes can be reverted quite easily if need be. Would you mind doing a review of my changes and letting me know if you have a problem with any of them?

[bennycode]

I like your Wiki changes. 😃

Do you like beers? If so, I would like to send you a bucket of nice beers to say "Thank you". 🍻