Adding support to various gaps

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
Addressing unit test failures

Addressing unit test failures
Adding JUnit

Added JUnit cases for
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
Merge branch 'master' of https://github.com/prasad-babu/xdocreport into prasad-babu-master
Merge branch 'prasad-babu-master'