Revert "Refactoring"

This reverts commit b7954bc63c2bd7afca09527a8d8b786f3324e6c5.
Merge remote-tracking branch 'origin/master'

Conflicts:
	OpenHtmlToPdf.Tests/HtmlToPdfConversion.cs
	OpenHtmlToPdf/Native/Wkhtmltox.cs
	OpenHtmlToPdf/OpenHtmlToPdf.csproj
	OpenHtmlToPdf/Pdf.cs
	OpenHtmlToPdf/Pdf/ContentSettings.cs
	OpenHtmlToPdf/Pdf/IPdfDocument.cs
	OpenHtmlToPdf/Pdf/PaperSettings.cs
	OpenHtmlToPdf/WkHtmlToX/WkHtmlToPdfHelper.cs
	OpenHtmlToPdf/WkHtmlToX/WkhtmlToPdfContext.cs