whitespace
Now that html/template is used, the "|html" is not needed.
status badge page with markdown/html snippets

ref #115, #107
Various minor changes and improvements.

- Add etag header to package pages, handle if-none-match.
- Hide link to status page. Will show later.
- Redirect search for standard package containing "/" in the path.
- Remove extra "/" at end of breadcrumb URLs.
- ... and more
Corrected README with the correct filename mention.

Also turned it a link (optional change).
Merge pull request #119 from shurcooL/patch-1

Corrected README with the correct filename mention.
Miscellaneous improvements

- Include package update time and child directories in HTTP etag
  calculation.
- If a package does not have a synopsis, then use the project
  description from the version control service as the synopsis.
- Do not merge links to package and export in code snippets.
Reformat pkg.html for legibility & add styling to make large docs more navigable.