* Bring back fetch tests.
* Zero initialize success array in PyPlasma_fetch.
* Fix bug in fetch in case where the object ID doesn't have any managers in the object table.
* Temporarily disallow calling fetch with multiple copies of the same object ID.
* Fix.
* Factor out code for checking if list of object IDs are all distinct.
* Remove commented out code.
* Fix.
* 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.
* Set logging levels in Makefile using -DRAY_COMMON_LOG_LEVEL=level
* Lower level of some LOG_ERROR messages, log the name of the table operation on failure
* Address rest of Robert's comments
* Fix spurious log message
* 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
* 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.
