Fixed two typos

* --keys insted of --key
* wrong brackets in example key json

Updated beempy --help to version 0.24.5

* configuration improved
* beempy help for each command added

Account
* Example forget SimilarAccountNames  added
* Example for history and history_reverse improved
Amount
* Example is tested with doctest
Block
* Example is tested with doctest
Price
* Fix example
Profile
* Fix example
Steem
* Example is tested by doctest
Transactionbuilder
* Example is tested by doctest
Vote
* datetime.now() changed to datetime.utcnow()
* Example is tested by doctest
Witness
* datetime.now() changed to datetime.utcnow()
* Example is tested by doctest
Docs
* Installation instruction improved
* Quickstart created
* Discord channel added to support

Account
* refactoring of  init
* Doku improved
Asset
* AssetNotFound handling improved
* Operation for equal and unqual added
Price
* usage of the new equal operation from Asset
Steem
* Improve key handling in account creation
Storage
* add sqlite3_copy and recover_with_latest_backup
beemgraphenebase/account
* add get_blind_private, get_public_key, get_secret, derive_private_key, child and derive_from_seed
Unit tests
* Use setUpClass to speed unit tests up (Steem is now created at the begging auf each unit test class
* Add unit tests for asset
* Add unit test for new beemgraphenebase/account functions

cli
* follower and following added
witness
* is_active added
Witnesses
* printAsTable improved
unit tests
* follower and following added to test_cli

Dokumentation for cli added
Profile added
cli
* sign, broadcast, setprofile and delprofile added
* refactoring
* wallet password from UNLOCK environment variable works
*
utls
* detection of complete urls added
unit tests
* tests for profile added
* new functions tests added to test_cli
* unit tests for utils improved