Change name for osx package

* configuration improved
* beempy help for each command added

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

Steem
* max_vote_denom is corrected and calculated as in steemit/steem
beemgrapheneapi
* handling of empty replies added

fix unit test

secp256k1 is faster than cryptography and put first

Try again with secp256k1

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

Bug fix for account
Block structure changed, is alwas {'block': , 'id'} now.
block function removed, Block is used now
Bug fix in comment
Discussions_by_payout removed
Several bugfixes in witness
More exception added to steemnoderpc
Unit tests for appbase nodes with parameterized added
steemnoderpc-unittest added

flake8 test added to travis
appveyor fixed
formatTimedelta used
flake8 fix
websocket improved

Tox.ini improved