Merge branch 'hotfix/0.18.0.12'
Update changelog version number
Clarify RESPONSIVE_STYLING setting
Update translations
note commonlib update in changelog
Update ALAVETELI_VERSION
Add note about HighlightHelper#excerpt backport

Requires Hash options
Update translations
Update translations
Fix translation bug in variable interpolation
Merge remote-tracking branch 'origin/release/0.19'
Merge branch 'master' into rails-3-develop

Conflicts:
	locale/cy/app.po