* global scheduler with object transfer cost awareness -- upstream rebase
* debugging global scheduler: multiple subscriptions
* global scheduler: utarray push bug fix; tasks change state to SCHEDULED
* change global scheduler test to be an integraton test
* unit and integration tests are passing for global scheduler
* improve global scheduler test: break up into several
* global scheduler checkpoint: fix photon object id bug in test
* test with timesync between object and task notifications; TODO: handle OoO object+task notifications in GS
* fallback to base policy if no object dependencies are cached (may happen due to OoO object+task notification arrivals
* clean up printfs; handle a missing LS in LS cache
* Minor changes to Python test and factor out some common code.
* refactoring handle task waiting
* addressing comments
* log_info -> log_debug
* Change object ID printing.
* PRId64 merge
* Python 3 fix.
* PRId64.
* Python 3 fix.
* resurrect differentiation between no args and missing object info; spacing
* Valgrind fix.
* Run all global scheduler tests in valgrind.
* clang format
* Comments and documentation changes.
* Minor cleanups.
* fix whitespace
* Fix.
* Documentation fix.
* Initial scheduler commit
* global scheduler
* add global scheduler
* Implement global scheduler skeleton.
* Formatting.
* Allow local scheduler to be started without a connection to redis so that we can test it without a global scheduler.
* Fail if there are no local schedulers when the global scheduler receives a task.
* Initialize uninitialized value and formatting fix.
* Generalize local scheduler table to db client table.
* Remove code duplication in local scheduler and add flag for whether a task came from the global scheduler or not.
* Queue task specs in the local scheduler instead of tasks.
* Simple global scheduler tests, including valgrind.
* Factor out functions for starting processes.
* Fixes.
* Put infrastructure in place to compute task IDs and object IDs.
* Fix version number for common library.
* Compute task IDs and object IDs deterministically.
* Address Stephanie's comments.
* Update task documentation.
* Fix formatting.
* Add more tests and checks.
* Fix formatting.
* Enable DCHECKs and change CHECKs to DCHECKs.
* Basic functionality for LRU eviction.
* Test eviction.
* Factor out eviction policy.
* Move delete_object into eviction policy.
* Replace array of released objects with an LRU cache (hash table + doubly linked list).
* Finish rebase on master.
* Move actual object deletion away from eviction policy and into plasma store.
* Small fixes.
* Fixes.
* Make remove_object_from_lru_cache always remove the object.
* Minor formatting and comments.
* Pass in allowed memory as argument to Plasma store.
* Small fix.
* Remove hiredis submodule.
* Squashed 'src/common/thirdparty/hiredis/' content from commit acd1966
git-subtree-dir: src/common/thirdparty/hiredis
git-subtree-split: acd1966bf7f5e1be74b426272635c672def78779
* Make Plasma tests pass.
* Make Photon tests pass.
* Compile and test with Travis.
* Deactive fetch test so that the tests pass.
