Merge pull request #196 from pwendell/master

TimeTrackingOutputStream should pass on calls to close() and flush().

Without this fix you get a huge number of open files when running shuffles.

(cherry picked from commit f20093c3afa68439b1c9010de189d497df787c2a)
Signed-off-by: Reynold Xin <rxin@apache.org>
Merge pull request #193 from aoiwelle/patch-1

Fix Kryo Serializer buffer documentation inconsistency

The documentation here is inconsistent with the coded default and other documentation.

(cherry picked from commit 086b097e33a2ce622ec6352819bccc92106f43b7)
Signed-off-by: Reynold Xin <rxin@apache.org>