Beem

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* Fix typo (PR 161)
* Add feature request 162 - one-time private keys can be used in beempy
* set num_retries to a default of 100, in order to prevent crashing when a wrong node is set
* Fix issue 171 - Account.get_balance function shows summed value of liquid balance and unclaimed reward (thanks to sourovafrin)
* Use Decimal class to store the amount in the Amount class
* Add option fixed_point_arithmetic to Amount, which will activate fixed-point arithmetic with the defined asset precision

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* Fix pyinstaller for windows
* Improve derive_permlink and allow replies of comments with permlink lenght > 235
* Broadcast custom_json with active authority
* Add new beempy command customjson

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* get_blog, get_followers and get_following works with api.steemit.com (issue 146)
* beempy newaccount - possible to provide owen, posting, active, and memo pub_key to create a new account
* https://rpc.usesteem.com added to nodelist
* NodeList.get_nodes() has a new parameter exclude_limited. When True (default value), api.steemit.com is not returned as node.
* PR 150: fix empty block handling (by crokkon)
* PR 151: Add support for EFTG appbase chain (by pablomat)
* PR 153: fix issue with adding posting auth to new accounts (by netuoso)

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* Fix transfer rounding error, which prevent transfering of e.g. 1.013 STEEM.
* get_account_votes works again with api.steemit.com
* Use secp256k1prp as better replacement for secp256k1

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* Fix beempy walletinfo and sign

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* Improve file reading for beempy sign and broadcast
* add option to write file for beempy sign
* Disable not working nodes
* add missing prefix to comment_options op (by crokkon)
* fix beempy verify --use-api (by crokkon)
* Update installation.rst (by Nick Foster)