Merge Patricks Tracer work to Devel

[codecov[bot]]

Codecov Report

Merging #133 into devel will decrease coverage by 1.76%. The diff coverage is 72.48%.

@@            Coverage Diff             @@
##            devel     #133      +/-   ##
==========================================
- Coverage   82.37%   80.60%   -1.77%     
==========================================
  Files         114      123       +9     
  Lines        6909     8548    +1639     
  Branches     1073     1436     +363     
==========================================
+ Hits         5691     6890    +1199     
- Misses        768     1027     +259     
- Partials      450      631     +181     

Impacted Files	Coverage Δ
...vance/standard/pipeline/compute_curl_b_pipeline.cc	98.59% <ø> (ø)
...ce/standard/pipeline/compute_div_b_err_pipeline.cc	92.85% <ø> (ø)
...ce/standard/pipeline/compute_div_e_err_pipeline.cc	97.36% <ø> (ø)
...advance/standard/pipeline/compute_rhob_pipeline.cc	97.36% <ø> (ø)
...tandard/pipeline/vacuum_compute_curl_b_pipeline.cc	98.59% <ø> (ø)
src/species_advance/standard/sort_p.cc	50.00% <ø> (ø)
src/util/checkpt/checkpt.cc	64.50% <ø> (+0.15%)	:arrow_up:
src/util/util_base.cc	58.16% <ø> (-1.22%)	:arrow_down:
src/vpic/initialize.cc	97.22% <ø> (ø)
src/vpic/vpic.h	85.00% <ø> (-1.67%)	:arrow_down:
... and 76 more

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