Merge pull request steemit#3362 from steemit/20190618-bump-version

Bump version to 0.21.0

Merge pull request steemit#3341 from steemit/20190530-fix-num-hfs

Fix num HFs for MIRA release

Merge pull request steemit#3273 from steemit/stable-pending-tx-release

Pending Tx Fix

Merge pull request steemit#3235 from steemit/20190103-json-fix

JSON fix (stable)

Merge pull request steemit#3207 from steemit/20181212-clear-on-unpack…

…-stable

When unpacking containers, clear the structures (stable)

Merge pull request steemit#3200 from steemit/20181210-bump-version

Bump version to 0.20.7

Merge pull request steemit#3105 from steemit/sp498

SP 498

Merge pull request steemit#3071 from steemit/20181015-bump-version

Bump version to 0.20.6

Merge pull request steemit#2996 from steemit/20180928-version-bump

Bump to 0.20.5

Merge pull request steemit#2977 from steemit/2961-rc-immediate-delega…

…tion

Increment rc_account.manabar immediately for positive RC changes steemit#2961