Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

Various updates and improvements.

Some updates I've had sitting in my tree for a while:

  - when there are two logs only, print a summary table at the beginning
    of the output with columns for allocs, runtime, memory reads/writes, instrs.

  - handle multiple runs of each program, and average the results. (changes
    to nofib build system to follow).

Add support for slurping in nofib dumps created with
EXTRA_RUNTEST_OPTS=-cachegrind, and output tables for number of
instructions, memory reads/writes, and cache misses.

fromInt ==> fromIntegral

Un-rot nofib-analyse, so it compiles with ghc-5.02.2.

* add a regexp for GNU time 1.7

* import Html hiding ((!)) now hides Html.! as well as !, so add an
  import qualified Html ((!)) as well.

* compile Printf with -fvia-c to work around bug in foreign import of
  snprintf (was always printing "0.00" no matter what input given).

Make this work with GHC 4.08, and remove duplicate (old) copy of Andy
Gill's HTML combinator package.

Add -t flag to specify title of report.

Move `Average' line back to bottom of table to save confusion.

Display (overall) averages for per-module statistics as well as for
per-program statistics.

Also, with `-d' (default; `-n' to turn off) compute geometric standard
deviations and display +/- 1 s.d. points as well as average.  Note that
since these are *geometric*, the lower point will appear closer to the
average than the upper.  This is correct behaviour.

Initial revision