* 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.
* Give more informative error message when we do not know how to serialize a class.
* Check that passing arguments to remote functions and getting them does not change their values.
* fix serialization bug
* fix tests for common module
* Formatting.
* Bug fix in init_pickle_module signature.
* Use pickle with HIGHEST_PROTOCOL.
* Add Python and Redis submodules, and remove old third-party modules
* Update VS projects (WARNING: references files that do not exist yet)
* Update code & add shims for APIs except AF_UNIX/{send,recv}msg()
* Minor style changes.
* Use sizeof(field) instead of sizeof(type) and other fixes.
* Fix formatting.
* Bug fix.
* Zero-initialize structs. There are many more instances of these that I haven't changed yet.
* Bug fix.
* Revert from atexit to signaling to fix valgrind tests.
* Address Philipp's comments.
* Merge task table and task log
* Fix test in db tests
* Address Robert's comments and some better error checking
* Add a LOG_FATAL that exits the program
* 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.
