Adding support to various gaps

I have been using the library to convert docx to html in our project. However because of limitation on formatting issues, we could not go ahead. So I have decided to make xdocreport work for at least supporting minimum requirements. I tried the following gaps to fill. The results are better now
list items(bullets, numbering etc.)

Text styles handling, fonts, highlighting, background colors, subscript,
superscript, strikes (single strikes) etc.
Tabs handling
Table borders(basic)
External images inserted/linked