Refactor Cell Definitions

[spgarbet]

Cell definitions are too limited and do not include comprehensive Greek letter values.

• Any text value can include a subset of LaTeX greek or math symbols that will render appropriately into the various output formats. Text values can also be bold or italic. This indicates that consideration needs to be made towards text formats in general. Should not get too broad use HTML5 as guideline and least common denominator.

Current possible cell definitions.

• Numerical Vector with possible name. Singles treated as single value, Doubles as Range, Triples as IQR, multiples as joined list.
• Text Only (with header/subheader attributes)--can have math symbols like Infinity, etc.
• A list of elements that are rendered comma separated.

Open question. What about N value handling?

[spgarbet]

This refactor is going well. It deleted 2 layers in the code, and the first render I've rewritten lost about 1/3 of it's code. Overall it's going to make the whole project more extensible and easier to use. Very pleased with this.

[spgarbet]

Need to finish fixing breakage on rmd, HTML5 and indexing. Otherwise current branch is lookin great. 2 layers of code deleted. No special adapter logic necessary. 1/3 of summary deleted. Will most likely delete more code in last three renderers as well.

[spgarbet]

Working and merged refactor branch.