Minor improvements to generated documentation
Minor improvements to generated documentation

- Enforce linebreaks in lists to separate descriptions, GFM doesn't
  honor linebreaks in lists
- Change "default value:" to "default:", shorter is better

Change-Id: Icdeb656c9715eaf9afa217be91046aced77ba514

eclipsesource/tabris-js,mkostikov/tabris-js,eclipsesource/tabris-js,pimaxdev/tabris,softnep0531/tabrisjs,moham3d/tabris-js,softnep0531/tabrisjs,mkostikov/tabris-js,paulvi/tabris-js,moham3d/tabris-js,eclipsesource/tabris-js,pimaxdev/tabris