Image blobs should be printed as images instead of hexdumps

[Lauri Niskanen]

Hi!

Cgit currently prints a hexdump when you look at a image blob (as with 
any other binary blob). This might be a good way to show generic binary 
files, but I think images (at least png, jpg) should be shown as images.

Example of the current behaviour:
	http://hjemli.net/git/cgit/tree/cgit.png

I suggest that instead of the hexdump you would have HTML like this:
	<img src="http://hjemli.net/git/cgit/plain/cgit.png" />

SVG images are not binaric so I would leave them printed as text.

What do you think about this?

-- 
Ape <Lauri Niskanen>