* Switches to sqlite and remove all mongo stuff
* Starts RPC server on port 8555
* UI is in new process, communicates to node through rpc
* JSON serialization for streamables
* Harvester periodically prints its plot names and sizes
* Process names are set to chia_full node, chia_harvester, etc
* CONTRIBUTING.md, and remove docs from git (put in wiki)
* Adds the SmallHeaderBlock type, it's header block without the PoT and PoSpace
* Fix harvester bug (allows two harvesters in the same machine)
Remove database access from blockchain, and handle headers instead of blocks
Avoid processing blocks and unfinished blocks that we have already seen.
Also adds test for load.
Plotting improvements