Explicitly import external class definitions and add code coverage to github actions

[ablack3]

This PR makes a few small changes

• Restore deploy.sh file to the repo per Marc's request
• Add code coverage to github actions
• Explicitly import all external class definitions to prevent a copy of these classes from being cached in Andromeda's Namespace
• Add a test to test that Andromeda's only cached class is "Andromeda"

[codecov[bot]]

Codecov Report

Merging #8 (e6abee1) into develop (af319d4) will increase coverage by 5.37%. The diff coverage is 82.35%.

@@             Coverage Diff             @@
##           develop       #8      +/-   ##
===========================================
+ Coverage    85.23%   90.61%   +5.37%     
===========================================
  Files            3        4       +1     
  Lines          271      341      +70     
===========================================
+ Hits           231      309      +78     
+ Misses          40       32       -8     

Impacted Files	Coverage Δ
R/Operations.R	93.00% <0.00%> (ø)
R/Object.R	84.78% <60.00%> (+0.33%)	:arrow_up:
R/LoadingSaving.R	91.01% <76.92%> (+14.46%)	:arrow_up:
R/Indices.R	95.00% <95.00%> (ø)

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[ablack3]

@schuemie - It looks like my commits to fix the class caching issue were added to this existing PR. Let me know if you want me to split this into two PRs.