added almost full print support

[bat-ventzi]

added:

• printOptions;
• pageSetup;
• pageMargins;

missing:

• headers and footers;

[VSRonin]

As the author is not active any more, please submit your pull request to https://github.com/VSRonin/QtXlsxWriter I'll take care of maintaining code until the author is back

[dbcb]

Hi Guys, first of all thanks for creating and maintaining this package. @VSRonin: The changes from bat-ventzi seems to me very important. Is there a reason, why it is not pulles to your repository? Thanks

[VSRonin]

@bat-ventzi never opened a pull request on my repository and just stealing his/her contribution from here would be at least unethical. Happy to review the code and work toward a merge if a pull request is opened