* Renamed getSimilarAccountNames to get_similar_account_names
* Fix doctest for account, profile, steem and utils

Account
* Examples and Dokumentation improved
Amount
* Example improved
Asciichart
* Examples improved
Blockchain
* examples improved
Discussions
* Doku improved
Market
* Examples and Doku improved
Price
* Examples improved
* Missing steem_instance fixed
Steem
* Example code fixed
Graphenerpc
* Example improved

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

CLI
* improved password handling and confirmation for changewalletpassphrase, delkey and createwallet
unit tests
improved test_cli
removed uneeded test for test_websocket

Add first version of beem logo to documentation