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
Merge pull request #109 from halfdan/patch-1

Simplify author link
Stop text from wrapping to a new line with icon

Fixes #112
Updating Casper's use of title and author helpers

Related to TryGhost/Ghost#3599 and TryGhost/Ghost#3389

- The title helper no longer needs triple-stashes to be safe
- The #author can now be used as a context block again
Merge pull request #113 from ErisDS/helper-updates

Updating Casper's use of title and author helpers
Fix bug where footer text would wrap to a new line
Adding download instructions to readme
Add nowrap to date & rss button

Closes #117, Closes https://github.com/TryGhost/Ghost/issues/3755

- Adds white-space: nowrap; to prevent strings wrapping and breaking onto multiple lines
Merge pull request #118 from PaulAdamDavis/nowrap-fix

Add nowrap to date & rss button
fix link tag typo
Merge pull request #119 from rossta/post_hbs_typo

Fix link tag typo
Swap Noto Serif to PT Serif
Rename icon assets & references

Closes #120

- Renames icon fonts and unicode references

This uses the same basic theory behind https://github.com/TryGhost/Ghost-UI/commit/8b25a3d07cda93f81d45e4c41add550afe03c01b which has been proven to work
Merge pull request #127 from PaulAdamDavis/emoji-icon-fix

Rename icon assets & references