Add parser pipeline builder to easy configure the parser pipeline.

[Tasteful]

This PR is for #56 and contains BaseSettingsBuilder.ConfigureParserPipeline method that will allow developer to easy configure the parser pipeline.

Not sure how this project usually handle deprecation:

• The `BaseSettingsBuilder.SetParserPipeline´ is obsoleted with a notice to use the new method,
• The Stubble.Core.Settings.IParserPipelineBuilder is added to only expose the methods that should be used from Stubble.Core.Builders.ParserPipelineBuilder during the configuration.

[codecov[bot]]

Codecov Report

Merging #58 into master will decrease coverage by 0.76%. The diff coverage is 45.45%.

@@            Coverage Diff             @@
##           master      #58      +/-   ##
==========================================
- Coverage   97.31%   96.55%   -0.77%     
==========================================
  Files          73       57      -16     
  Lines        2012     1450     -562     
==========================================
- Hits         1958     1400     -558     
+ Misses         54       50       -4

Impacted Files	Coverage Δ
...c/Stubble.Core/Settings/RendererSettingsBuilder.cs	94.59% <100%> (ø)	:arrow_up:
src/Stubble.Core/Settings/BaseSettingsBuilder.cs	97.14% <100%> (-2.86%)	:arrow_down:
src/Stubble.Core/Builders/ParserPipelineBuilder.cs	85.29% <14.28%> (-8.15%)	:arrow_down:
...derer/TokenRenderers/InterpolationTokenRenderer.cs	100% <0%> (ø)	:arrow_up:
...ingRenderer/TokenRenderers/SectionTokenRenderer.cs	100% <0%> (ø)	:arrow_up:
...n/Renderers/TokenRenderers/SectionTokenRenderer.cs
...ubble.Compilation/Renderers/CompilationRenderer.cs
...c/Stubble.Compilation/Settings/CompilerSettings.cs
...n/Renderers/TokenRenderers/LiteralTokenRenderer.cs
.../Stubble.Compilation/Class/EnumerationConverter.cs
... and 11 more

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[Romanx]

Hey @Tasteful,

Sorry for the delay on this one, i've been a bit busy. I made a minor change to revert the interface on the ParserPipelineBuilder since i'm not a fan of abstracting something that there will likely be only one implementation of.

Besides that i'm very happy with the contribution and look to get this released shortly! Thanks very much