Only show hero on first page and when no filters have been added.
Deletes some todos since they will be converted into jira tasks.
Merge pull request #52 from himedlooff/gh-pages

Updates
Don't show an author if there is none set.
Supports multi authors on landing page.
DRYing some post template stuff.
Update for posts with no category.
Update for posts with no category.
Fixes pop stories list.
Restrict related links to 5 not 4.
Updates todos.
Sets up custom icons per category.
Merge pull request #53 from himedlooff/gh-pages

Updates
Update posts_mappings.json
Add Open Graph metadata, share links
rm whitespace
Merge branch 'gh-pages' of github.com:Scotchester/cfgov-refresh into gh-pages