Add tests for getting to 10 entries

Add button should be removed at 10 and replaced if
you then remove one.
Add amends to listEntry.js
Remove trailing whitespace in test
Add required scripts to Gruntfile.js
Add tests for id pattern to wordcount spec
Correct data attribute on input-list wrapper div
Merge pull request #48 from alphagov/add-test-to-list-entry-js

Tests passing now. Excellent.