Add see also section to posts footer (#152)

* Fix series list page title

* Add see also section to posts footer

exampleSite/content/posts/creating-a-new-theme.md

@@ -4,6 +4,7 @@ title = "Creating a New Theme"
 slug = "creating-a-new-theme" 
 tags = []
 categories = []
+series = ["Theme", "Hugo"]
 +++
 
 ## Introduction

exampleSite/content/posts/external-post.md

@@ -11,4 +11,5 @@ categories = [
     "Development",
 ]
 externalLink = "https://github.com/luizdepra/hugo-coder/wiki"
+series = ["Hugo"]
 +++

exampleSite/content/posts/goisforlovers.md

@@ -13,7 +13,7 @@ categories = [
     "Development",
     "golang",
 ]
-series = ["Getting Started"]
+series = ["Getting Started", "Hugo"]
 +++
 
 Hugo uses the excellent [go][] [html/template][gohtmltemplate] library for

exampleSite/content/posts/hugoisforlovers.md

@@ -11,7 +11,7 @@ categories = [
     "Development",
     "golang",
 ]
-series = ["Getting Started"]
+series = ["Getting Started", "Hugo"]
 +++
 
 ## Step 1. Install Hugo

exampleSite/content/posts/migrate-from-jekyll.md

@@ -2,7 +2,7 @@
 date = "2014-03-10"
 title = "Migrate to Hugo from Jekyll"
 description = "The post explains how to migrate from from Jekyll to Hugo."
-series = ["Getting Started"]
+series = ["Getting Started", "Hugo"]
 +++
 
 Table of Contents

exampleSite/content/posts/theme-demo.md

@@ -4,7 +4,7 @@ title = "Theme Demo"
 description = "The post demonstrates features of the coder theme."
 images = ["/images/N90.jpg"]
 math = "true"
-
+series = ["Theme", "Hugo"]
 +++
 
 ## Style Demo