Version 2.1.0

Fixed Bugs:

• HTML-to-PowerPoint is creating many extra columns with colspan #284 (svaak)
• HTML-to-PowerPoint rowspan is not working (gitbrent)
• Fix docs/examples to use new fontSize, remove unsupported font_size #297 (pstoll)

Implemented Enhancements:

• Mis-detecting Existence of Node.js #277 (adrianirwin) (DSheffield)
• Add Text Outline functionality #298 (stevenljacobsen)
• Adding rounded corners to images #309 (hoangpq)