Cleanup front page
Currently the front page of the wiki is crammed with information nobody will seriously read. I propose to move details to separate subpages (e.g. documentation, Contribution guidelines) to reduce the wall of text in this page and provide good UX.
Missing Link: gnuradio organization
Sine I am new, I don't know how to fix this. But having this missing links with 404 Errors on such central pages... should be fixed.
The Development page has been corrected. The Main Page is now corrected also. Thanks for catching this!