update scala version to 2.10.0
re-organize modules

use sbt-0.12.2
use finagle 6.2.0
use util 6.2.0
Merge branch 'feature-scala_2.10' into develop
set version to 0.5.0
Merge branch 'release-0.5.0' into develop
bump version to 0.6.0-SNAPSHOT