Prevent scroll-down contrast BG from overlapping in Firefox

Closes #110
Version bump
Pluralise post count for author page

No issue

- Introduces the new `plural` helper to correctly word the number of posts
Merge pull request #111 from PaulAdamDavis/master

Pluralise post count for author page
Replace dodgy author helper with better one
Tweak
Simplify author link

no issue