data: Add a top level wrapper for `Linker`. The `family` object is special in that it's "attached" to the current page, so make an object dedicated to that. It removes special code in `Linker`, and makes it possible to go `family.children` directly to get a page's children (i.e. pages in a directory of the same name).

colorama==0.3.1
compressinja==0.0.2
Jinja2==2.7.3
Markdown==2.4.1
MarkupSafe==0.23
mock==1.0.1
py==1.4.23
Pygments==1.6
pystache==0.5.4
pytest==2.6.1
pytest-mock==0.2.0
python-dateutil==2.2
PyYAML==3.11
regex==2014.12.24
repoze.lru==0.6
six==1.7.3
smartypants==1.8.6
strict-rfc3339==0.4
textile==2.2.1
Werkzeug==0.9.6