update scalaj 0.3.16, httpclient 4.3.4

(cherry picked from commit 9dbf4c160d934079ddfa5fa4f5a2c942e47a5cdc)
async

(cherry picked from commit cd8515e876a2a9f049e2dafaf9bb57d315016cb7)
scalacOptions

(cherry picked from commit c2fee1066e9a89d4397794acbf268c5cfc942abe)
Scala 2.11.2

(cherry picked from commit 802b76ad13e05591285bbf5e3ab7ec3515eaa851)
sbt 0.13.5

(cherry picked from commit 7ab121df5d42545c7ae9e93f61b6dc4f4e2ed414)
httpclient 4.3.5, async-http-client 1.8.13

(cherry picked from commit bb8bddcac1bff608164cde33453b864f898272e0)