NB: To put the display into fullscreen mode (if it is running as an extension) press spacebar.
ImpView is built using Middleman. Run "middleman build" to regenerate the output folder. You will need to run "bundle install" to install any dependencies first.
Please submit any patches via the issue tracker at http://redmine.haydenball.me.uk/projects/impview/.
Hint:
git format-patch master --stdout > mypatch.patch
In the output folder, open "control.html" in Google Chrome (in theory all webkit browsers should work, and other browsers with a few minor changes to vendor specific features in css and js). You will need to accept the "display.html" pop-up.