Added support for inline command comments
Replaced cursor_first_expr which represents the first expresion member of the enum, with its actual value, and the first expression - cursor_unexposed_expr.
expose comment source range
add direction parsing to ParamComment
add text method to comment base class, which fixed exceptions from ParagraphComment.text when joining children
Merge pull request #17 from jorj1988/master

Various additions and bug fixes.