Convert README to markdown and move to root

This is the probably the most popular Github supported format.
Added standard python .gitignore

From:
https://github.com/github/gitignore/blob/master/Python.gitignore
Daemon script for controller.
Merge pull request #3 from staldates/feature/git-github-updates

Feature/git github updates
Add note to readme about controller daemon script.
Use variable-speed zoom, set to an arbitrary value, because I have no idea what the old system used.
Add "backlight compensation" controls to VISCA cameras, and use them in the interface - this replicates the original behaviour of the AMX.
Resize some things, based on the actual hardware it's currently running, and likely to run, on.
Blat unused import.
Blat another unused import.
Might as well move DVD player to the place in the inputs list that matches its index (4)...
More Aldates-migration-specific code; don't show controls for cameras/Eclipse scan converter before they're wired in.
Implement Jamie's suggestion of keyboard shortcuts to select input and take-to-all.
Auto-focus button.
Top-align labels on camera controls.
Use Python logging framework rather than sysout^Wprint statements.
Use Python logging on client-side too.