Add support of pipe tables.

TableBlock was added to the MarkdownParagraph.
It's similar to the table block type in pandoc source code.
Except that we don't take into account table caption and column widths.

Paragrph was replaced with Paragraph in several places.
Merge pull request #8 from opestov/tables

Support of pipe tables
Add error handler parameter
Merge branch 'master' of github.com:tpetricek/FSharp.Formatting
Update generated documentation
Update version