Merge branch 'release/v0.8.0' into develop
bump version to 0.9.0-SNAPSHOT
update dependencies
add SazabiClient extends TransactionalClient which
    - implement PEXPIRE
    - implement PEXPIREAT
    - implement PTTL
    - implement PING
implement JSONR/JSONW for
    - java.net.InetAddress
    - java.net.InetSocketAddress
    - java.net.URL
fix Router to support prefix-ommited-routing
conversion between com.twitter.util.Future and scala.concurrent.Future
conversion between com.twitter.util.Try and scala.util.Try
implement new SET syntax introduced in redis 2.6.12
update specs2 dependency
fix JSONW for InetAddress/InetSocketAddress
add/fix tests
drop ostrich/finagle-ostrich4 dependencies
set version to 0.8.1
Merge branch 'release/v0.8.1'