resolves #139 allow theme to set font size & family of table cells
resolves #139 allow theme to set font size & family of table cells

- support font size, family and style for cells in the table head row
- support font size and family for cells in table body rows
- normalize endlines of cell content in table head row

hmflash/asciidoctor-pdf,DavidGamba/asciidoctor-pdf,dsisnero/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,abatalev/asciidoctor-pdf,Hextremist/asciidoctor-pdf,abatalev/asciidoctor-pdf,hmflash/asciidoctor-pdf,Hextremist/asciidoctor-pdf,dsisnero/asciidoctor-pdf,theimdal/asciidoctor-pdf,theimdal/asciidoctor-pdf,asciidoctor/asciidoctor-pdf,DavidGamba/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,asciidoctor/asciidoctor-pdf