dialyzer fix part 1/N (several points to be discussed)
dialyzer fix part 2/N
dialyzer fix 3/N: bring our dependencies
fix for both CS and CS-EE mode
BSD egrep understands numeric repitetion so well, while GNU egrep doesn't.
accept other choices than RIAK_CS_EE_DEPS=true
drop R14B support and set callback attributes
add spec of md5_* functions for R15B0x
defer riak-erlang-client dialyzer things after Riak 2.0
Merge branch 'feature/ku-dialyzer-fix' into develop

Conflicts:
	rebar.config (velvet updated to the latest)