beempy newaccount - possible to provide owen, posting, active, and memo pub_key to create a new account

* remove wss://steemd-appbase.steemit.com

fix issue with adding posting auth to new accounts

* normal and appbase option for Nodelist are deprecated. 
* exclude_limited added for getting a nodelist without api.steemit.com.
* full node server added
* unit tests adapted

* Remove not working steemitdev testnet
* exclude api.steemit.com from some tests

Scheduled weekly dependency update for week 04

Update chains.py

Add support for EFTG appbase chain

Scheduled weekly dependency update for week 03

fix empty block handling

Avoid BlockDoesNotExistsException on `blockchain.stream()` and `Block()`
with `only_ops=True` on blocks without ops.
Fixes #149.

Scheduled weekly dependency update for week 01

* Improve file reading for beempy sign and broadcast
* add option to write file for beempy sign

This reverts commit b86e513f.

* Improve file reading for beempy sign and broadcast
* add option to write file for beempy sign

Scheduled weekly dependency update for week 52