update the WeakHashSet version with the most current one in Scala
upgraded to specs2-RC2-SNAPSHOT
added a check for the deserialisation of data on the client side
tagged the DistCacheSpec as an Unit specification
fixed the pegdown version
trying out a different ordering for dependencies
fixed the asm library dependency
updated the specs2 version
started the expiry implementation for checkpoints
fixed the use of the proper checkpoint path when using a bridgestore as a checkpoint
merged with master and finished the integration
added a missing passed parameter for expiry
Add stratify methods to DList.

Implement 'stratify' and 'stratifyWeighted' on DList. 'stratify' is a
generalised version of 'partition'. Add specs that leverage ScalaCheck
to vary the generated DLists as well as the number and relative sizes of
stratums/partitions.
skipping a test for now
Added the new stratify method. Merge commit '0e3fd23'
small code review change on the stratify method. Fixes #272
fixed #273 where input channels where not created properly because of a Scalaz bug
changed the groupWhen method to partitionWhen to avoid misunderstandings with the scalaz method
renamed partitionWhen to partition
set the compression to false for a DataSink unless it is explicitly specified