Updated Kryo to 2.20.
Added the ability in block manager to remove blocks.
Return success or failure in BlockStore.remove().
Merge branch 'master' of github.com:mesos/spark into spark-633
Merge branch 'master' of github.com:mesos/spark into spark-633
Merged TD's block manager refactoring.
Merge branch 'master' of github.com:mesos/spark into spark-633
Fixed conflicts from merging Charles' and TD's block manager changes.
Merge branch 'spark-633' of github.com:rxin/spark into spark-633
SPARK-616: Logging dead workers in Web UI.

This patch keeps track of which workers have died and marks them
as such in the master web UI. It also handles workers which die and
re-register using different actor ID's.
Fixed repl maven build to produce artifacts with the appropriate hadoop classifier and extracted repl fat-jar and debian packaging into a separate project to make Maven happy
Merge pull request #338 from tomdz/repl-pom-fix

Fixed repl maven build
Tweaked debian packaging to be a bit more in line with debian standards
Merge pull request #340 from tomdz/deb-packaging-tweaks

Tweaked debian packaging to be a bit more in line with debian standards
Moved BlockManager's IdGenerator into BlockManager object. Removed some
excessive debug messages.
Merge pull request #337 from pwendell/worker-liveness-ui

SPARK-616: Logging dead workers in Web UI.
Let the slave notify the master block removal.
Merge pull request #327 from rxin/spark-633

Added the ability in block manager to remove blocks.
Merge pull request #341 from rxin/4a3fb06ac2d11125feb08acbbd4df76d1e91b677

Kryo2 update against Spark master
Remove the call to close input stream in Kryo serializer.