Adding DateFilter docs
Adding DateFilter docs

ceolter/angular-grid,killyosaur/ag-grid,killyosaur/ag-grid,seanlandsman/ag-grid,killyosaur/ag-grid,makinggoodsoftware/ag-grid,ceolter/angular-grid,seanlandsman/ag-grid,ceolter/ag-grid,ceolter/ag-grid,seanlandsman/ag-grid,makinggoodsoftware/ag-grid