Remove draft post
Update gems
Remove unused header
Enable offline editing
Add development gems
Change skills to links
Add speaking page
Add final speaking page [closes #55 #56]
Merge branch 'speaking'

* speaking:
  Add final speaking page [closes #55 #56]
  Add speaking page
  Change skills to links
  Add development gems
  Remove unused header
Fix failing link checker
Add 404 page [closes #60]
Add estimated reading time to posts [closes #53]
Added images