New mark-up for affixed fields
Remove redundant classes
Support silent mode for pre/suffixed buttons
Merge branch 'master' of https://github.com/Financial-Times/o-ft-forms into fix-prefixes-suffixes

Conflicts:
	src/scss/prefix-suffix.scss
Merge branch 'master' into fix-prefixes-suffixes

Conflicts:
	demos/src/prefix-suffix.mustache
	src/scss/fields.scss
Fix merge conflicts
Merge pull request #36 from Financial-Times/fix-prefixes-suffixes

Fix prefixes suffixes