kai mandatory for build

rebar.config

@@ -1,6 +1,6 @@
 {deps_dir, ["deps"]}.
 {deps,[
 %    {riak_kv,    ".*",    {git, "git://github.com/spawnproc/riak_kv.git", {tag,"1.3.2-voxoz"}}},
-%    {kai,         ".*",   {git, "git://github.com/synrc/kai.git", "master"}},
+    {kai,         ".*",   {git, "git://github.com/synrc/kai.git", "master"}},
     {mqs,        ".*",    {git, "git://github.com/synrc/mqs.git", "master"}}
 ]}.