INSTALL: Refer to new Building wiki page.
Added Enable/Disable All Buttons
Analog buffer sharing crash by memcpying for the AnanlogSignal::paint
Tolerate unexpected packets rather than asserting
Moved SamplingBar into pv::toolbars namespace
Renamed pv::view::LogicSignal::LogicSignalColours to SignalColours
Setup analog probe colours
Various tidyups in LogicSnapshot
Added a scale factor to AnalogSignal
Added code to construct analog envelope levels
Implemented Basic analog tests
Implemented AnalogSnapshot::get_envelope_section
Make Snapshot::get_sample_count() a const function
Added analog envelope painting
Implemented Ctrl+Q quit shortcut
Draw analog with a polyline rather than points