Support LaTeX embedded formulation rendering in Markdown

[ewinnington]

Is your feature request related to a problem? Please describe.
I would like to embed LaTeX formulas in the markdown portion of the document. This would allow to document the math accompanying the code.

Describe the solution you'd like
Similar to ipython notebooks, use a MathJax-aware renderer to render the markdown to html. See this page for inspiration

A typical formula to render would be:

\sum ^{n}_{i=0}\left(x_{i}+a_{i}y_{i}\right)

Example image generated by QuickLatex

Describe alternatives you've considered
LaTeX formulas could be pre-rendered before or at launch, either by dotnet try or by another tool and shown as images.

[colombod]

The PR #243 enables the use of math and latex in markdown