Used setter for children at all places
Merge pull request #133 from hason/patch-1

Used setter for children at all places
Used public Twig API to render a menu template
TwigRenderer accepts a menu template only as string
Merge pull request #137 from hason/twig_api

Used public Twig API to render a menu template
Adding links to docs
Merge pull request #143 from aequasi/patch-1

Adding links to docs
Added 2 new options for leaf & branch classes
Fixed option name and wrong conditions
Fixed options names in documentation
Merge pull request #148 from Nek-/feature/leaf-and-branch-classes

Added 2 new options for leaf & branch classes