add qflip as a weight component
initialize chargeFlip tool with the file mapping d0sig < 3

Details:
This also requires a patch in the charge flip tool (otherwise looking
for a histogram that is not in this file, but in the default one).
See email thread 'qFlip map' on 2013-09-09.
sameSignOrQflip: fix logic

Details:
We want to compute the qflip only for the events that canBeQflip. For
the other ones, don't call the function so that we don't modify the
weight components.  All the ingredients were already there, but it
wasn't behaving correctly.
reset weights within SusySelection::cacheStaticWeightComponents

Details:
There is already a call to reset the weight components within Process.
That is useful only within SusySelection, and it is necessary for the
increment[readin].  However, this doesn't work for the inheriting
classes (e.g. SusyPlotter). This call within
cacheStaticWeightComponents should ensure that we start with unity
weight components at each event.
drop obsolete commented-out part
drop unused vars
compute btag weight with jets up to 2.4 (was 2.5)

Details:
This is the same jet selection used by Anyes, and specified as
JET_ETA_CUT_2L in SusyDefs.h.  I don't know why I was using 2.5
instead.
use m_baseJets as input to computeNonStaticWeightComponents

Details:
this is basically used to compute the btag weight. I don't know why we
should use this jet collection rather than the other one
(m_signalJets2L).