Bump version to 0.16.3.

Version bump to 0.16.2

Bump the version and add release notes

Bumping the Mkdocs Version to roll a release

Merge pull request mkdocs#827 from d0ugal/master

Handle relative paths in symlinks

Bump version to 0.15.2

Bump version to 0.15.1

Bump version to 0.15.0

version 0.14.0

Bump version 0.13.3