* Define execution dependencies flatbuffer and add to Redis commands
* Convert TaskSpec to TaskExecutionSpec
* Add execution dependencies to Python bindings
* Submitting actor tasks uses execution dependency API instead of dummy argument
* Fix dependency getters and some cleanup for fetching missing dependencies
* C++ convention
* Make TaskExecutionSpec a C++ class
* Convert local scheduler to use TaskExecutionSpec class
* Convert some pointers to references
* Finish conversion to TaskExecutionSpec class
* fix
* Fix
* Fix memory errors?
* Cast flatbuffers GetSize to size_t
* Fixes
* add more retries in global scheduler unit test
* fix linting and cast fbb.GetSize to size_t
* Style and doc
* Fix linting and simplify from_flatbuf.
* Add actor handle ID to the task spec
* Local scheduler dispatches actor tasks according to a task counter per handle
* Fix python test
* Allow passing actor handles into tasks. Not completely working yet. Also this is very messy.
* Fixes, should be roughly working now.
* Refactor actor handle wrapper
* Fix __init__ tests
* Terminate actor when the original handle goes out of scope
* TODO and a couple test cases
* Make tests for unsupported cases
* Fix Python mode tests
* Linting.
* Cache actor definitions that occur before ray.init() is called.
* Fix export actor class
* Deterministically compute actor handle ID
* Fix __getattribute__
* Fix string encoding for python3
* doc
* Add comment and assertion.
* Fix socket bind collisions in manager_tests
* bind manager sockets before connecting to the store
* fix memory leak in tests
* fix valgrind early process termination
* fix bind/listen/subscribe race condition
* fix photon
* fix other tests
* make it that all of common is tested
* fix clang-format
* fix
* Ion and Philipp's table retries
* Refactor the retry struct:
- Rename it from retry_struct to retry_info
- Retry information contains the failure callback, not the retry callback
- All functions take in retry information as an arg instead of its expanded fields
* Rename cb -> callback
* Remove prints
* Fix compiler warnings
* Change some CHECKs to greatest ASSERTs
* Key outstanding callbacks hash table with timer ID instead of callback data pointer
* Use the new retry API for table commands
* Memory cleanup in plasma unit tests
* fix Robert's comments
* add valgrind for common
Stephanie Wang