Pathwise Sampling (Take 2)

[rossviljoen]

Supersedes #65, Closes #7

Implements pathwise sampling of functions from sparse GP posteriors from [1]

[1] https://arxiv.org/abs/2002.09309

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TODO:

• Remove example before merging and move it to a new PR

[rossviljoen]

Docs build will fail because of #105

EDIT: I think I will just remove the example from this PR and add it in a separate one once this is merged and tagged

[codecov[bot]]

Codecov Report

Merging #112 (41eb95e) into master (e8513ad) will decrease coverage by 0.36%. The diff coverage is 93.18%.

@@            Coverage Diff             @@
##           master     #112      +/-   ##
==========================================
- Coverage   95.78%   95.42%   -0.37%     
==========================================
  Files           4        5       +1     
  Lines         285      328      +43     
==========================================
+ Hits          273      313      +40     
- Misses         12       15       +3     

Impacted Files	Coverage Δ
src/PathwiseSamplingModule.jl	86.95% <86.95%> (ø)
src/SparseVariationalApproximationModule.jl	96.96% <100.00%> (+0.76%)	:arrow_up:

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