[Halld-offline] merging devel branch into trunk today

[Richard Jones]

Dear all,

I have just completed the merge of our sim-recon-rj-pm development branch
into the main trunk. I know Paul has not completed everything he wanted to
do in developing the new code to handle the variable simulation t0, but I
was having too much trouble keeping up with all of the merges from the
trunk, so I had to jump back in.

I had gotten to the point where every other update from the trunk resulted
in a conflict. I guess everyone knew this was coming, and so it is not a
surprise.

I have done the following to verify that basic things should still work in
the trunk.

   1. make sure that a scons install completes without errors.
   2. make sure that bggen -> hdgeant -> mcsmear -> danarest completes
   3. make sure that bggen -> hdgeant -> mcsmear -> rawevent completes
   4. check with hd_dump that the results of steps 2 and 3 are consistent
   at the reconstruction level, and the number of high-level reconstructed
   objects, eg. tracks and clusters, looks reasonable and consistent.

Actually this may be the first time anyone has seen #4 complete
successfully, because there were numerous problems in the evio
encoding/decoding, esp. for the drift chambers, that existed in the trunk
and I had to find and fix the bugs to make things work in my branch. Now
these fixes should be imported into the trunk.

That much is known to work. Still, there may be problems. Please post
notices of whatever surprises you find to this list.

-Richard J.
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