OpenXML Filter: correleate a:latin, a:ea, a:cs and a:sym DrawingML font properties with w:rFonts of WordprocessingML

[Denis Konovalyenko]

Consider the following run:

<a:r>
  <a:rPr …>
    <a:latin typeface="Sample Font"/>
    <a:ea typeface="Sample Font"/>
    <a:cs typeface="Sample Font"/>
    <a:sym typeface="Sample Font"/>
  </a:rPr>
  <a:t>Sample Text</a:t>
</a:r>

Text content has only latin set of characters (more precise research on the range of characters is needed). So, ea, cs and sym properties can be removed. Need to take care of target documents as well.