* breaking: convert {docsify-ignore} and {docsify-ignore-all} to HTML comments
Close https://github.com/docsifyjs/docsify/issues/441
* chore: add ignore and ignore-all unit tests
Co-authored-by: 沈唁 <52o@qq52o.cn>
* Adds option to specify an header height
When using a template that has a sticky-header, clicking on the sidebar will
scroll the page under the header.
I added the option `headerHeight` (default = `0`) so that the content div will
be scrolled down that amount of pixels.
* updates documentation and renames variable