Add generic descriptions for templates

Fixes #8
diff --git a/templates/archives.html b/templates/archives.html
index 7201bbd..1fdddf2 100644
--- a/templates/archives.html
+++ b/templates/archives.html
@@ -1,6 +1,8 @@
 {% extends "base.html" %}
 {% block title %}Archive | {{ SITENAME }}{% endblock %}
 
+{% block description %}A listing of all posts on this site{% endblock %}
+
 {% block subheader %}
 {% include "modules/blogsubheader.html" %}
 {% endblock subheader %}
diff --git a/templates/author.html b/templates/author.html
index c2decd3..ee17552 100644
--- a/templates/author.html
+++ b/templates/author.html
@@ -1,6 +1,8 @@
 {% extends "index.html" %}
 {% block title %}Author: {{ author }} | {{ SITENAME }}{% endblock %}
 
+{% block description %}Posts by {{ author }} on this site{% endblock %}
+
 {% block subheader %}
 <p>Author: {{ author }}</p>
 {% endblock %}
diff --git a/templates/authors.html b/templates/authors.html
index 741fc17..f668d5e 100644
--- a/templates/authors.html
+++ b/templates/authors.html
@@ -1,6 +1,9 @@
 {% extends "base.html" %}
 {% block title %}Authors | {{ SITENAME }}{% endblock %}
 
+{% block description %}A listing of all authors on this site{% endblock %}
+
+
 {% block subheader %}
 {% include "modules/blogsubheader.html" %}
 {% endblock subheader %}
diff --git a/templates/categories.html b/templates/categories.html
index e089140..7dfad91 100644
--- a/templates/categories.html
+++ b/templates/categories.html
@@ -1,6 +1,8 @@
 {% extends "base.html" %}
 {% block title %}Categories | {{ SITENAME }}{% endblock %}
 
+{% block description %}A listing of all categories on this site{% endblock %}
+
 {% block subheader %}
 {% include "modules/blogsubheader.html" %}
 {% endblock subheader %}
diff --git a/templates/category.html b/templates/category.html
index 753d990..d60326a 100644
--- a/templates/category.html
+++ b/templates/category.html
@@ -1,6 +1,8 @@
 {% extends "index.html" %}
 {% block title %}Category: {{ category }} | {{ SITENAME }}{% endblock %}
 
+{% block description %}Posts in the {{ category }} section of this site{% endblock %}
+
 {% block head %}
 {% if CATEGORY_FEED_ATOM %}
 <link href="{{ FEED_DOMAIN }}/{{ CATEGORY_FEED_ATOM|format(category.slug) }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} {{ category }} Category Atom Feed" />
diff --git a/templates/tag.html b/templates/tag.html
index 7261e5c..fef669a 100644
--- a/templates/tag.html
+++ b/templates/tag.html
@@ -1,6 +1,8 @@
 {% extends "index.html" %}
 {% block title %}Tag: {{ tag }} | {{ SITENAME }}{% endblock %}
 
+{% block description %}Posts tagged with '{{ tag }}' on this site{% endblock %}
+
 {% block head %}
 {% if TAG_FEED_ATOM %}
 <link href="{{ FEED_DOMAIN }}/{{ TAG_FEED_ATOM|format(tag.slug) }}" type="application/atom+xml" rel="alternate" title="{{ SITENAME }} {{ tag }} Tag Atom Feed" />
diff --git a/templates/tags.html b/templates/tags.html
index fd3320a..e7c728a 100644
--- a/templates/tags.html
+++ b/templates/tags.html
@@ -1,6 +1,8 @@
 {% extends "base.html" %}
 {% block title %}Tags | {{ SITENAME }}{% endblock %}
 
+{% block description %}A listing of all tags on this site{% endblock %}
+
 {% block subheader %}
 {% include "modules/blogsubheader.html" %}
 {% endblock subheader %}