Instead of manually doing String::format("%d"/"%u") everywhere, let's have
a String API for this. It's just a wrapper around format() for now, but it
could be made more efficient in the future.
I originally called it "linear" because that's how the Intel manual names
virtual addresses in many cases. I'm ready to accept that most people know
this as "virtual" so let's just call it that.
Also run it across the whole tree to get everything using the One True Style.
We don't yet run this in an automated fashion as it's a little slow, but
there is a snippet to do so in makeall.sh.
* Added CProcessStatisticsReader to avoid having to parse /proc/all
* Took @awesomekling's feedbacks into account
* Fixed indentation and replaced tabs by spaces
