Add linebreaks in generated markdown
Add linebreaks in generated markdown

In some cases, missing linebreaks between subsequent markdown
elements lead to rendering glitches. For example, when a headline
directly follows a bullet list, a linebreak is required.

Add linebreaks after headlines and after items (events, fields,
properties, and methods).

Fix #876

Change-Id: I5ce1cfc57f22323b1aea156a337e676cb27e4bd2

eclipsesource/tabris-js,eclipsesource/tabris-js,eclipsesource/tabris-js