Account
* update_account_keys added for changing account keys
* comment fixed for chains without SBD
RC
* RC changes from 0.20.6 included
Witness
* Fixed for chains without SBD symbol
Operations
* Claim_reward_balance fixed for chains without SBD symbol

Chains
* VIT fixed

CONSTANTS
* STEEM_REVERSE_AUCTION_WINDOW_SECONDS_HF20 added

Nodelist
* nodes information updated

Steem
* get_dust_threshold() improved and get_config used
* hardfork checks improved
* hardfork property improved by using get_hardfork_properties function

Changelog.rst added and Issue #80 fixed

Change name for osx package

Add first version of beem logo to documentation

Graphenerpc
* some refafctoring
Steemnoderpc
* fix next_node_on_empty_reply

Try again with secp256k1

remove secp256k1 from circelei

Account
* Improved some function, so that account works limited on GOLOS
Blockchain
* sync changes from python-bitshares
Instance
* sync changes from python-bitshares
Steem
* Improved some functions so that steem works on GOLOS
Chains
* Added GOLOS
graphenebase/Account
* derive256address_with_version added
ecsdasig
* Huge speed improvement (200%) by using cryptography
benchmark added
* benchmark for beemgraphenebase/account funcions
* benchmark for ecdsa
* benchmark for sign/verification of all transaction
Examples
* compare sign/verificaiton speed with steem
Unit tests
* use memo unittests from steem-js
* add key_format unittests from steem-js
* Improved the ecdsa tests

Limit coverage to python 3.6

add unit tests for remove_from_dict