Enabled caching (disable with &force=on) for /api/data-preview ; closes #293
Enabled caching (disable with &force=on) for /api/data-preview ; closes #293

HXLStandard/hxl-proxy,HXLStandard/hxl-proxy,HXLStandard/hxl-proxy,HXLStandard/hxl-proxy