Adding KLD to abc example

[jonathanishhorowicz]

• Also linking x-axes in plot recipes so that they line up.

[codecov-io]

Codecov Report

Merging #59 into master will decrease coverage by 0.28%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   75.21%   74.92%   -0.29%     
==========================================
  Files          18       18              
  Lines        1053     1057       +4     
==========================================
  Hits          792      792              
- Misses        261      265       +4

Impacted Files	Coverage Δ
src/abc/plot_recipe.jl	0% <0%> (ø)	:arrow_up:

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[tanhevg]

See screenshot - the dotted line that indicates the true value does not touch the y axis any more (highlighted by the ellipse). This does not look right.

Maybe revert the changes to that recipe, just change the recipe for individual results.