Fix top/bottom margin when not using dynamic header/footer
When not using dynamic header/footer via --header-html and --footer-html we still need to set the reserve heights to the static margin values provided. I think this preserves the old margins/spacing behaviour.
Fixed a small typo in the docs.
Add header/footer heights autocalculation; fix disappearing header/footer for huge vertical margins; fix moving headers/footers outside the page for huge spacing values
…le.com/p/wkhtmltopdf/issues/detail?id=175]; fix half visible headers/footers when they are huge; escape header/footer dispersing out of page for bigger spacing values
Enhancement for Issue 810: Browser Cache Control
Ensure bin directory exists
otherwise it will fail during ups compression