OpenWrt documentation

1. who's the recipient (the level)?
Low level, good to get newbies started, but still answering higher level questions


2. List of content ?

FOR EACH MODULE
Possible documentation format (separated sections):
- Platforms it works on (and differences)
- Packages needed
- Directions (as generic as possible, nothing atheros or broadcom specific if possible, otherwise both choices given)
- Fixes to make in 7.0X and 7.0Y so people know how to work around problems, and which version
- Frequent mistakes