Added possibility to strip original style tags.
Added possibility to strip original style tags.

stof/CssToInlineStyles,webbab/CssToInlineStyles,webbab/CssToInlineStyles,stof/CssToInlineStyles,webbab/CssToInlineStyles,tijsverkoyen/CssToInlineStyles,tijsverkoyen/CssToInlineStyles,barryvdh/CssToInlineStyles