Updated README.md

Updated README.md

Updated README.md

Passed all 3B tests

Updated README.md

simplify leader's commit and log commit on each peer

Simplified the implementation of sendAppendEntriesToPeer() and heartbeat functions

Passed the first 4 tests of 3B

Refined the implementation of Lab 3A. Passed all 3A test cases in much shorter time. The old election timer used time.Timer, which made the implementation more complicated than necessary. Replace it with time.Since() instead. Removed all channels and select statements as they are unnecessary - we can just reorganize the code blocks within the select cases to work with variables and loops instead. Finally, create a different RNG for each server, using their IDs as the seeds - this ensures the randomized election timeout needed in Raft.

Previous commit didn't always pass. In fact, it often failed because we had to wait, in the same goroutine, for channel writes to complete. Now wrap every channel write in a goroutine to prevent deadlocks/waiting for the write.

Finished and passed all test cases for Part 3A. Implemented leader election (and re-election) using channels and mutexes.

Fixed typo in test-mr.sh

Added link to the source of setup code

Merge remote-tracking branch 'refs/remotes/origin/master'

Implemented worker failure detection and tolerance by timing out. Passed all tests. Fixed user email typo