Roll riak version 1.3.0 RC3
Change the erlang vm flags to force SMP use

This addresses basho/riak#274 where Riak
failed to start and run on single CPU machines.
Merge pull request #275 from basho/jem-smp-flag

Change the erlang vm flags to force SMP use
Add riak/274 to the RELEASE-NOTES
Add Bitcask io_mode to app.config
Merge pull request #276 from basho/jdb-bitcask-io-1.3
Update release-notes for RC4
Roll version Riak 1.3.0 RC4
Fix IPv6 notes typo

IPv6 addresses are 8 groups of numbers, but 16 bytes (128 bits).
Remove WIP note from RELEASE-NOTES
Roll Riak version 1.3.0
Merge branch '1.3'