Several wiki pages contain obsolete info

[amarsman]

Several wiki pages contain obsolete info, e.g.:

https://github.com/the-butterfly-effect/tbe/wiki/MilestonePlans#milestone-planning https://github.com/the-butterfly-effect/tbe/wiki/WindowsBuild still talks about Qt4

[kaa-ching]

sigh You're probably right...

[Wuzzy2]

I don't care much about a GitHub wiki, also I bet it would be painful for migrating this should we ever decide to move TBE to some other hoster.

I think all documentation should instead go into the repository itself in the form of readme files, etc.