Documentation and FAQ updated

[Dominus]

Hey ho,
after the discovery of my very bad mistake with the optional path settings in exult.cfg it was time for an update. Also updated changes to the Music system. And some smaller errors and help in the FAQ I was pointed at by helpful users.
Probably expect spelling mistakes as I'm currently working on my very tiny laptop.

Don't correct my spelling but if you see anything besides that which needs to be corrected, worded better, extinguished, added or whatever just tell me. Either to the forum or to my emai address.
Thanks and have a good read!
Dom