[WIP] Builder Reporting

[shyamd]

This PR adds in Reporting into the Build System:

• Reporting is done by sending extra data in logging info`
• a ReportingHandler catches this extra info and sends it to a reporting Store
• mrun now has a -r option to load a reporting Store
• Store names have been updated to be more descriptive
• docs include information on enabling reporting and simple description of the reporting data

[codecov]

Codecov Report

Merging #80 into master will increase coverage by 0.1%.
The diff coverage is 81.92%.

@@            Coverage Diff            @@
##           master      #80     +/-   ##
=========================================
+ Coverage   86.73%   86.84%   +0.1%     
=========================================
  Files          20       20             
  Lines        1365     1421     +56     
=========================================
+ Hits         1184     1234     +50     
- Misses        181      187      +6

Impacted Files	Coverage Δ
src/maggma/core/store.py	87.5% <ø> (ø)	⬆️
src/maggma/stores/gridfs.py	84% <0%> (ø)	⬆️
src/maggma/stores/advanced_stores.py	80.34% <0%> (ø)	⬆️
src/maggma/stores/aws.py	75.96% <0%> (ø)	⬆️
src/maggma/stores/compound_stores.py	79.53% <0%> (-0.95%)	⬇️
src/maggma/stores/mongolike.py	94.08% <100%> (ø)	⬆️
src/maggma/cli/__init__.py	92.3% <100%> (+0.87%)	⬆️
src/maggma/builders/group_builder.py	85% <100%> (+0.18%)	⬆️
src/maggma/builders/__init__.py	100% <100%> (ø)	⬆️
src/maggma/cli/multiprocessing.py	94.2% <100%> (+0.26%)	⬆️
... and 3 more

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