[Changelog] python-graphenelib 0.4.2

0.4.2 Release 0.4.2

New:

- [exchange] returnOpenOrdersStruct and significant speed improvements
- [exchange] speedup by storing assets in RAM instead of polling them each time
- [exchange] allow returnId together with cli-wallet
- [logging] implement logging for exchange.py

Fixes:

- [api] log properly json-formated requests/replies
- [api] make sure to use increasing request ids, more flexibility for method overwriting
- [api] fix a small error list() vs. set()
- [feeds] fix linting and GrapheneDex
- [api] More detailed error message if dispatching fails
- [exchange] reduce load on API by storing our own account object
- [transactions, exchange] Fix Bool-string representation and subsequent trouble in exchange.py
- [api] cleanup wsprotocol
- removed debugging print statement
- updated variable names according to suggestions, moved repeating code into a for loop, added commented out example code for altcap.
- small comment fix and changed a few variable names
- 2nd try at a fix for smartcoins not priced in the core_asset
- Possible fix for issue #33, small config-example fix