Add some error handling around find_latest_ringfile so we can deal with them on startup
Add some error handling around find_latest_ringfile so we can deal with them on startup

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