BentonSans-normal is now preferred sans-serif font.
Merge branch 'master' of https://github.com/Financial-Times/o-fonts into case-insensitivity

# By Dan Searle
# Via Dan Searle
* 'master' of https://github.com/Financial-Times/o-fonts:
  BentonSans-normal is now preferred sans-serif font.

Conflicts:
	src/scss/_variables.scss