* Changelog adapted to next release

Fix issue #171 - Account.get_balance function shows summed value of liquid balance and unclaimed reward

* When fixed_point_arithmetic is set to True, is the amount parameter always be rounded down to the asset precision
* Add Handling of multiplying with a Price object
* Both parameter are rounded down to the precision in all comparison operation as ==, 

* change the internal representation of amount from float to Decimal
* Round amount down to precision
* Adapt amount test to Decimal
* Round down all other number in all operation 

* set num_retries to a default of 100, in order to prevent crashing when a wrong node is set

* prepare next beem release and increase version number
* switch default chain to STEEMAPPBASE

Scheduled weekly dependency update for week 13

Fix typo

powerup -> delegate

* with beempy customjson sending of custom_json operation is easily possible
* Changelog adapted to 0.20.19

* custom_json with required_auths are now broadcasted with active key
* json field in custom_json is broadcasted compact (spaces are removed)

derive_permlink was improved so that replys to posts/comments with a permlink length of more than 235 characters is possible
unit tests added

Scheduled weekly dependency update for week 08

Scheduled weekly dependency update for week 07

Scheduled weekly dependency update for week 05