message: Added Issue - new lang text option
diff: - New chart options: Shadows and Transparent Color [\#166](https://github.com/gitbrent/PptxGenJS/pull/166) ([clubajax](https://github.com/clubajax))
  - Add no border option to tables [\#169](https://github.com/gitbrent/PptxGenJS/issues/169) ([eddyclock](https://github.com/eddyclock))
  - Chart: Escape Labels XML [\#171](https://github.com/gitbrent/PptxGenJS/pull/171) ([kyrrigle](https://github.com/kyrrigle))
  +- Add new 'lang' text option to enable Chinese Word font_face to take effect [\#174](https://github.com/gitbrent/PptxGenJS/issues/174) ([eddyclock](https://github.com/eddyclock))
  - Negative Chart values throwing error [\#175](https://github.com/gitbrent/PptxGenJS/issues/175) ([shaunvdp](https://github.com/shaunvdp))
  