resolves #714 resize title logo image to keep on page (PR #715)
resolves #714 resize title logo image to keep on page (PR #715)

- resize title logo image if it exceeds boundaries to keep it on page
- specify height when embedding image to prevent redundant calculation
- don't advance page to fit image if pinned option is specified
- disable margins on block image if pinned option is specified
- simplify cursor management when embedding title logo image
dsisnero/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,asciidoctor/asciidoctor-pdf,Hextremist/asciidoctor-pdf,mojavelinux/asciidoctor-pdf,asciidoctor/asciidoctor-pdf,Hextremist/asciidoctor-pdf,dsisnero/asciidoctor-pdf