added docs
Merge pull request #1 from joshuasobrin/master

Added a docs directory to master branch
Cleaned documentation of channel_pingpong_fileserver. Aggregator and catcher are now in debug mode, so you only need to run run_coordinator to see the output. It will print the channel, index, and data of each packet received.
Changed set_channel_ids to restart the data thread. DemultiplexCatcher now has default channel_ids for testing. Coordinator's start_data_thread method could easily be altered to take channel arguments by calling set_channel_ids rather than start_data_thread (since set_channel_ids now calls start_data_thread). (reverse-merged from commit 129fc0107c235e38470215913e737ebabac37f54)
Merge remote branch 'refs/remotes/origin/master'