tiegcm/trunk:
 - Merge parallel dynamo code to the tiegcm trunk. This is much the same
   as the parallel dynamo in the timegcm trunk, except that mlev0 (zp -8.5),
   is 3 levels below the tiegcm lb for 5-deg resolution (6 levels below the 
   lb for 2.5-deg resolution).
 - Differences between this code and the previous revision with the old serial
   dynamo are non-zero, but are generally small, and do not tend to increase
   with model time. Neutral temperature and composition differences are
   usually < 1%, whereas diffs of ion drifts, Ne, electric field and electric
   potential can reach a few percent. Differences are somewhat higher for the
   2.5-degree model (possibly up to 10% in some cases). I am not convinced that 
   this is the final word on the parallel dynamo in tiegcm, but it does appear 
   to be stable, so I am committing it as a waypoint toward v2.0.
 - Performance improvement is about 36.4% at 5-deg resolution (0.07 vs 0.11
   secs per timestep with 16 pes on ys), and about 43.4% at 2.5-deg resolution
   (.17 vs .30 secs per timestep with 64 pes on ys). With the default timestep
   of 2-minutes for the 5-deg model, a full-year run could be completed in about
   5.1 hours, and with the default timestep of 1-minute for the 2.5-deg model,
   a full-year run would take about 25 hours. (For quiet-time, the 2.5-deg model 
   can be run with a 2-minute step, in which case a full-year run could be completed
   in 12.1 hours). 
 - These source files have been added: pdynamo.F, esmf.F, current.F90, timing_mpi.F.
 - These source files have been deleted: colath.F, current.F, highlatpoten.F,
   efield.F, wei01gcm.F, and dynamo.F.
 - As with timegcm_pdyn, this code requires that the ESMF (Earth System Modeling
   Framework) library be linked for converting between geographic and geomagnetic 
   grids (see esmf.F).
 - At this time this code is being built only with the Intel/ifort compiler on
   yellowstone and at hao.