Convert string values to numbers before comparison using <= and >=
Update generated data: fix total number of contributions
Replace underscore with dashes in radio values

The same convention is used in the name of files and properties
with the corresponding data.
Update generated data: remove ']' after last item in each list
Add data for working group categories
Add module which keeps track of the selected grouping criterion
Rename filter.js to filter-authors.js
Move and clarify comment about initial filters
Replace private variable fieldNames with shared property 'field-names'
Initialize field positions in a subscription to "field-names"
Rename 'count-records.js' to 'count-author-records.js'
Rename 'count-selected.js' to 'count-selected-authors.js'
Rename 'code-selected-percentage.js' to 'code-selected-author-percentage.js'
Rename 'print-selected.js' to 'print-selected-authors.js'
Rename 'list-selected.js' to 'list-selected-authors.js'
Publish "categories" based on selected grouping criteria
Add module to display the total number of current categories
Rename 'filed-names' property to 'author-field-names'
Move percentage() to utils module for reuse across modules
Rename 'filtered-data' property to 'selected-authors'