Adds ConcurrentMemory platform, shows value of DagOptimizer
Merge branch 'develop' into future-memory
Take part of the changes in
Remove warning
Fix rest of code
Review comments
Merge pull request #545 from twitter/release/0.5.2rc2

Release/0.5.2rc2
Add the tests
Merge branch 'develop' into future-memory
Add more comments
Merge pull request #538 from twitter/future-memory

Example of using DagOptimizer
Merge branch 'develop' into stormOnlineRefactor
Move to function0