fix 2.0pre11 links, plus some other things
minor fixes
fix more version weirdness
add note about using specific versions of Erlang
Revert "add note about using specific versions of Erlang"

This reverts commit 8c877dea3653e21959bc9f5fc2c6ae9aad14336f.
clean up Installing Erlang doc
remove V.V.V in debian-ubuntu guide
fix version tags everywhere else
Merge pull request #798 from basho/bugs/lp/install-docs

Fix install docs