[Changelog] python-graphenelib 0.4.6

Version 0.4.6

New:

• [API] Allow for a list of API nodes
• Allow 'proper' wif encoding for compressed keys
• [example] drain fee pool
• [example] more example scripts
• [example] Halt an asset, prevent people from transfers and trading

Fixes:

• [api] do not show first reconnect messages
• [base] return pub keys on verify signed transactions
• [transactions] Fix Unknown op error and incorrect handling of 'extensions'