Link "Templating" to Rendered Simplates

I had someone looking for templating docs on the homepage and couldn't
find them, which is understandable:

http://www.reddit.com/r/Python/comments/1b3t09/why_gittip_use_aspen_instead_of_djangorails/c93ejxht
Release 0.22.17
Bump version to 0.22.17-dev
Release 0.22.18
Bump version to 0.22.18-dev
Fix up more links on homepage
Release 0.22.19
Bump version to 0.22.19-dev
Changed page delimiter to ----+

See issue #167
Changed page break style in www/*
Replaced all page breaks in doc/*
Updated test_json_resource
Updated test_resources.py, EXCEPT for negotiated resources
Updated test_website
Fix links to aspen repo

While the website is still Python-centric we may as well point to the
Python repo's new location.
Release 0.22.20
Bump version to 0.22.20-dev
Initial implementation of issue #167

-Untested
-Other source files have not been updated
Updated most of the page breaks
Fixed most of the remaining page breaks