Renamed $respondents_autocomplete_handle to $customers_autocomplete_handle

It was missed when conversion from respondent to customer due to a
merge conflict
Renamed respondents-autocomplete.js to customers-autocomplete.js
Renamed changed file in grunt as file is renamed
Rebuilded CSS/JS resources
Merge pull request #173 from VarunAgw/customers

Remove `respondents` strings from merge conflict.
Bump version for cachebusters.
Close ticket link was not working

Fixes #174
Add required dependencies to customer-autocomplete script file