* 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.
* 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
