[cairo] Improving the cairo-perf tools UI

[Alexandros Frantzis]

Hi all,

I have decided to take a look at improving the UI of the cairo-perf
tools. This is a good chance to provide a clean and usable UI and
promote adoption of the tools.  Hopefully, we will end up with a
versatile design that can easily accommodate changes in the perf tools
internals.

Please send in your ideas and suggestions and of course everyone is
welcome to help. I personally like Chris's idea for a single "cairo-perf
<command> <options>" like tool.

Thanks,
Alexandros