Add language files
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Adding trial of openlayers 3.  Start on page to show trail of user locations.
More work on displaying user trails.
Refininments to user trail html page
Added survey locations to userTrail
When uploading surveys check for read only questions that are mandatory.  Also check for constraints that don't refer to the current question. Add more styling to user trail page.
Convert start and end times of trace view to UTC.