Introduces an additional jm_state to avoid resending JMTX in case
the response to checkUtxosAccepted takes too long.
Fix bug in -Qt where blockr wallet sync is called with fast option.
Make unconfirmed message more informative (more TODO here).
Fix bug in blockr_data (from upstream).
Also, some minor changes: filter_orders_callback taken outside
Taker since it involves user input necessarily. Related, answeryes
removed from module, can be done outside.
Donation code explicitly removed from all code branches for now.
A couple of very minor changes thrown up from testing.
Coverage of Taker now 100%, will work on the rest of jmclient.
Slight modification to install process, using pip install to avoid
polluting directories with build data.
Added general regression test support files to test/ (distinct from
planned package-level unit tests), this 2 levels of test should
function much better.