genetics: Move into a subdirectory

This creates a genetics/ subdirectory and places all relevant files in
there. Uploaded images are placed in genetics/uploads/.

Closes #27.
genetics/webcam.php: Update comment header

HTML comments are minified, PHP comments are not.
genetics/webcam.php: Change filename separator

This transforms:

    [ip].[date].webcam.jpg

into:

    [ip]-[date]-webcam.jpg

This allows for easier sorting of file names by using the hyphen as a
delimiter.
Merge branch 'iss27'