Re-merge branch '1.1' into master to pick up missing sections
Re-merge branch '1.1' into master to pick up missing sections

Several sections on core improvements/known issues were in master but
missing from the 1.1 branch, despite being relevant to the 1.1 release.
Likewise, the most recent merge of 1.1 to master removed these sections
from master as well.

A recent commit to the 1.1 branch re-adds these missing sections, and
this merge pulls them back into master.

yangchengjian/riak,GabrielNicolasAvellaneda/riak,xuejianhai/riak,biddyweb/riak,glickbot/riak,basho/riak,laurenrother/riak,DavidAlphaFox/riak,amyvmiwei/riak,authbox-lib/riak,elkingtonmcb/riak