blog: Make the atom feed title configurable.
blog: Make the atom feed title configurable.

The blog code is quite generic and with the replacement of template and
static files, it can be re-used. But the atom feed title is hard-coded
into the code. This patch adds a field to set the atom feed title to
the Config structure and uses it in the code where the title was
previously hard-coded.

A CL sent separately will set this Config field in the main package in
the go.blog sub-repository. (See CL 16850043 for that other patch).

R=golang-dev, adg
CC=golang-dev
https://codereview.appspot.com/16830043

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

t-yuki/go.tools.old,t-yuki/go.tools.old,t-yuki/go.tools.old