Fix 497 & 562; .splice causes issues when skipping columns. I also noticed some null references in the internal KeyValueDiffers, so changed the reorder to a simple switch;
Fix 497 & 562;
.splice causes issues when skipping columns. I also noticed some null references in the internal KeyValueDiffers, so changed the reorder to a simple switch;

stupiduglyfool/ngx-datatable,janssonav/ngx-datatable,achimha/ngx-datatable,swimlane/ngx-datatable,swimlane/angular2-data-table,swimlane/ngx-datatable,swimlane/ngx-datatable,achimha/ngx-datatable,swimlane/angular2-data-table,janssonav/ngx-datatable,stupiduglyfool/ngx-datatable,swimlane/angular2-data-table,janssonav/ngx-datatable,stupiduglyfool/ngx-datatable,achimha/ngx-datatable