ipkb stat and formulas from the command line.
util/stats/info.py:
no need to raise an attribute error if two values aren't found
in the exact same set of runs. Would be good to check that each
run is the same though.
util/stats/stats.py:
more graph tweaking
command to execute a formula from the command line.
add interrupts per kilobyte of data
--HG--
extra : convert_revision : 78d6b14d340d08edcbc69e4c1c5a4c1dd9bb10dd
ab10712341