more debug info if strategy import fails
more comments to the strategy and a new slot connected to history.signal_changed
implement optional grouping (binning) and optional summing totals in orderbook window.
improve catching of exceptions inside curses loop, helps with coding and debugging.
command line option for passing the password
Merge branch 'master' of git://github.com/prof7bit/goxtool
Merge branch 'master' into aab