Swap blog and presentations menu order - #174

Changed pages include:

• index.html - view
• 404.html - view
• analytics/index.html - view
• docs/index.html - view
• posts/index.html - view
• presentations/index.html - view
• docs/concepts/index.html - view
• docs/getting-started/index.html - view
• docs/how-to/index.html - view
• docs/reference/index.html - view

There are more changes not included in the list