Renamed SamplingBar::configure to on_configure
Commit the samplerate before beginning to sample
Added missing braces in pv::dialogs::Connect::populate_drivers()
Added proper error handling to pv::SigSession::feed_in_header()
Added error handling to SignalHandler
Add NSIS file for use with cross-compiled PulseView.
Replace GPLv2+ references with GPLv3+.

Most of the PulseView files may be licensed under the GPLv2+, but by linking
against libsigrok (which is GPLv3+) the binary as a whole is GPLv3+.

Reflect that in the COPYING file, the documentation, and the GUI.
win32: Use -mwindows to avoid opening a "DOS box".
Bring the cursors into view when they are shown
Added an accelerator for show/hide cursors
Made the sdi a persisent property of SigSession
Only the open the file if the user clicked ok in the dialog
Update the SigSession device, when it is selected by the user
Open/close devices as needed
Added missing virtual destructors