RawString added to types
Some improvements and fixes

All parameter are packed now in a correct way
Correct operationid for Witness_set_properties

objects.Amount
* naming of symbol and asset improved

Refs #72

Transactionbuilder
* Prepare broadcasting in new appbase format
* Force condenser_api by now
RPCUtils
* Improve detection of conenser_api
Streemnoderpc
* Improved error message for Assert Exception:v.is_object()
beembase.Object
* Add new appbase Operation format
beemgraphenebase.object
* Add handling of new appbase operation format

beembase\objects
* Amount improve handling of new appbase Amount format
beembase\operations
* Account_witness_proxy added
* Custom added
* Custom_binary added
* Prove_authority added
* Limit_order_create2 added
* Request_account_recovery added
* Recover_account added
* Escrow_transfer added
* Escrow_dispute added
* Escrow_release added
* Escrow_approve added
* Decline_voting_rights added
Unit tests
* add test_order_create2, test_witness_proxy, test_custom, test_request_account_recovery,  test_recover_account, test_escrow_transfer, test_escrow_dispute, test_escrow_release, test_escrow_approve, test_decline_voting_rights, test_delegate_vesting_shares, test_account_create_with_delegation added

Formatting of all doc parts improved
Logo and icon added
Doc structure improved
quickstart improved

* More unit tests
* Handling of Amount for Appbase improved
* Fixed unit tests for Python 2.7

account
* function for reputation to score calculation
* Doku improved
amount
* better handling of offline mode
steem
* Doku improved
transactionbuilder
* handing of appbase for tx verify and broadcast improved
utils
* node list added as function
* not needed function removed
steemnoderpc
* handling of server errors improved
objects
* Amount fixed for appbase
exception
* RPCErrorDoRetry added, when a rpc call should be retried
grapherpc
* Handling of server error 500 to 511 added
* better handling when get_config does not work
unit tests
* nodes and nodes_appbase are take from utils
* keys is used instead of wif for Steem()
* unit test for broadcast added
* unit test for appbase for verify added
* test_operations added
* test_types added

testnet is not reliable, so using golos for testing

Transactionbuild
* Automatic Signing with owner key removed
Beembase/account and beembase/bip38 removed as they are using beemgraphenebase/bip38 and beemgraphenebase/account

Unit tests fixed for STEEM-style encrypted memos

Account:
* sp vp properties added
* print_info improved
* reputation -> get_reputation
* voting_power -> get_voting_power
* steem_power -> get_steem_power
precision removed
balance -> get_balance

CLI
* set, config createwallet, walletinfo, addkey, listkeys, listaccounts and changewalletpasswordphrase added

create_account_with_delegate added

Unittests
Unit tests fixed and added

Python2 comp
* str comp added
* py23 with py23_bytes added with unit tests
* moved back to __bytes__
* super() made compatible with python 2
Account:
* allow and disallow moved from steem
* small improvements
Comment
get_votes added
Steem
* Doku improved
Vote
* bug fixes
* printAsTable
Wallet
* getPostingKeyForAccount added
test_vote added
test_testnet added
test_py23 added

reduced dependency
this allow easier pushing to conda-forge

More unit tests added
Some bug fixes

commitee and worker removed