Merge pull request #45 from jimmysong/43

Issue #43: additional pep8 compliance
Merge pull request #47 from jimmysong/46

46
Removing debug prints I left in by accident.
Merge pull request #48 from Ademan/txdb

Removing debug prints I left in by accident in tests.
Issue #46: Documented more python files

Documented electrum/meat/ngccc*/pwallet/rpc_interface.

Fixed ui/qtui since the api changed to be lookup_by_moniker.
Added setval/getval to rpc_interface.
Refactored ngccc* to be simpler python scripts.