Improved documentation

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Display nested levels of sections.

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Added numbering of the sections

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Don't fall-back through multiple nested sections

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Sections numbering is optional.

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Multi-level collapsing is optional (false by default)

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Merge pull request #3 from synopsys-arc-oss/appearance-refactoring

Appearance refactoring