Filter by inline help
Use eventDestination as description

eventLabel is split between eventSource and eventDestination.
eventSource is where the help was called from, eventDestination is the
help page.
Change stub data to use new filter and group by fields
Merge branch 'master' into fix-help-usage
Capitalise 'i'
Capitalise BACS
Extract function to capitalize special words
Refactor method to have an explicit list of special words
Minor refactor of help usage table capitalisation
Merge pull request #242 from alphagov/fix-help-usage

Fix help usage