iowatcher: Remove iowatcher/README

This README is getting out-of-date and its contents are duplicated in
the iowatcher manpage which is up-to-date, so remove it to reduce
duplication of effort.

Signed-off-by: Andrew Price <anprice@redhat.com>

diff --git a/iowatcher/README b/iowatcher/README
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-iowatcher graphs the results of a blktrace run.  It has a few different modes:
-
-       * Graph the result of an existing blktrace
-
-       * Start a new blktrace
-
-       * Start a new blktrace and a benchmark run
-
-       * Make a movie of the IO from a given trace (only mp4 for now)
-
-Output:
-
-       iowatcher can produce either svg files or mp4 movies.  Most browsers
-       can view the svg files, or you can use rsvg-view-3 from librsvg.
-       rsvg-convert can turn the svgs into many other formats.
-
-Building:
-
-       Type make and make install.  We need ffmpeg or png2theora, and
-       librsvg to make movies, otherwise there are no dependencies.
-
-The basic options:
-
-       -d controls which device you are tracing.  You can only trace one device
-          at a time for now.  It is sent directly to blktrace, and only
-          needed when you are making a new trace.
-
-       -t controls the name of the blktrace file.  iowatcher uses a dump from
-          blkparse, so -t tries to guess the name of the corresponding
-          per CPU blktrace data files if the dump file doesn't already exist.
-
-          If you want more than one trace in a given graph, you can specify
-          -t more than once.
-
-       -F Add a fio bandwidth log graph.  You need to run fio --bandwidth-log
-          to get one of these, and then pass either the read log or the write
-          log into iowatcher.
-
-       -l Sets a label in the graph for a trace file.  The labels are added in
-          the same order the trace files are added.
-
-       -m Create a movie.  The file format depends on the extension used in the
-          -o filename.* option.  If you specify an .ogv or .ogg extension, the
-          result will be Ogg Theora video, if png2theora is available.
-          If you use an .mp4 extension, the result will be an mp4 video if
-          ffmpeg is avilable.  You can use any other extension, but the end
-          result will be an mp4.
-
-          You can use --movie=spindle or --movie=rect, which changes the
-          style of the IO mapping.
-
-       -T Set a title for the graph.  This goes at the top of the image.
-
-       -o output filename.  The default is trace.svg.  iowatcher is
-          only able to create svg for now.
-
-       -r control the duration in seconds for the rolling average.
-          iowatcher tries to smooth out bumpy graphs by averaging the
-          current second with seconds from the past.  Longer numbers here
-          give you flatter graphs.
-
-       -P add per-process tags to the IO.  Each process responsible for
-          submitting the IO gets a different color.
-
-       -O add a single graph to the output.  By default all the graphs
-          are included, but with -O you get only the graphs you ask for.
-          -O may be used more than once.
-
-       -N remove a single graph from the output.  This may also be used more
-          than once.
-
-       Choices for -O and -N are:
-          io, fio, tput, latency, queue_depth, iops, cpu-sys, cpu-io,
-          cpu-irq, cpu-user, cpu-soft
-
-Examples:
-       
-       # generate graph from the existing trace.dump
-       iowatcher -t trace.dump -o trace.svg
-       
-       # skip the IO graph
-       iowatcher -t trace.dump -o trace.svg -N io
-
-       # only graph tput and latency
-       iowatcher -t trace.dump -o trace.svg -O tput -O latency
-
-       # generate a graph from two runs, and label them
-       iowatcher -t ext4.dump -t xfs.dump -l Ext4 -l XFS -o trace.svg
-
-       # Run a fio benchmark and store the trace in trace.dump
-       # add a title to the top.  Use /dev/sda for blktrace
-       iowatcher -d /dev/sda -t trace.dump -T 'Fio Benchmark' -p 'fio some_job_file'
-
-       # Make a movie from an existing trace
-       iowatcher -t trace --movie -o trace.mp4
-
-Please email chris.mason@fusionio.com with any questions