Modernize placement of post list page and add some comments.
By modernize I mean that Hugo formerly used the "section/section"
scheme, but now we can put all related section templates in one folder.
Also, more commenting!
Improve layout structure so users don't have to name posts "post"
By moving default to a page layout and posts to default, any section can
be a post. Some users were confused when they had posts that were not
named as such. No need to impose naming conventions on people.
Don't duplicate site title in home page TITLE tag (#78)
Let's say your `.Site.Title` is "My Website". The code grabs `.Site.Title`, and then then checks to see if there's a `.Title`. When you're on the homepage, `.Title` is equivalent to `.Site.Title`, so that the browser bar will read:
> My Website | My Website
If we qualify `.Title` by confining to the `.Params` namespace, then the site title isn't duplicated:
```<title>{{ block "title" . }}{{ .Site.Title }} {{ with .Params.Title }} | {{ . }}{{ end }}{{ end }}</title>```
> My Website
But it still picks up `.Title` from posts and pages, where a content title exists in front matter:
> My Website | About Me
Fixes #50
Hugo's `.Summary` did not behave as I expected it to, not stripping out
HTML, so I removed the anchor block from around the posts and moved the
links to the image, title and a read more button.
* using Hero sample image in the theme's /static folder
* fall back to site config
* fall back to hard coded default if none set in page or site params