trival change to review unneeded error logging since an exception is already thrown to the caller
kafka-938; High CPU usage when more or less idle; patched by Sam Meder; reviewed by Jun Rao
compile use 2.10.2-RC1; fix compilation warnings; add scala-reflect dep;
tune scalac and javac options;
compile using scala 2.10.2-RC2; publish to local maven repositoy
Merge branch '0.8-scala-2.10' of https://github.com/songpp/kafka into 0.8-scala-2.10
compile using scala 2.10.2, merge bugfix from apache-kafka upstream 0.8