[Changelog] Piston 0.2.1

0.2.1 Release 0.2.1

New:

 - [log] deploy logging infrastructure
 - [docs] default node wss://this.piston.rocks
 - [createaccount] now with password instead of brainkey

Fixes:

 - Misspelled keys
 - [docs] Documentation and consistency
 - [docs] add requirements for autodocs
 - [docs] contributions
 - [main] Add logging, new default node
 - [setup] updated dependencies
 - [steem] identify edits with _patched
 - [steem] update listing and clarify a few error messages
 - [tests] initial tests for steem
 - [ui] allow listing of lists and dicts
 - [wallet] refactor wallet for easier use of it's methods