Moved asciitraf from private repo

This was originally written in October 2010.
upifs: Show interfaces that are UP
asciitraf-all: Launch one asciitraf for each IF
asciitraf: Print interface name and average values
asciitraf: Draw a symmetrical graph

Upstream is shown as lines that go upward. Downstream lines go downward.
asciitraf: Draw in color
asciitraf: Draw average values
asciitraf: Use timestamps for better time measurement
asciitraf: Again, higher default time delta

Some NIC drivers don't reliable update their statistics in a high
frequency. We may get false readings.
asciitraf: Draw solid blocks instead of R and T
asciitraf: Asynchronous drawing
asciitraf: Print thousands separators
asciitraf: Fix a lot of alignment and rounding issues
asciitraf: "-d" should be seconds
dwm-status: Show interfaces that are up
dwm-status: Fix bug in Vim's syntax highlighting
asciitraf: Tune colors
asciitraf: Symmetric autoscale by default, option to disable it
asciitraf: T always comes before R
asciitraf: Fix whitespace