Updated export and filter-control README

src/extensions/export/README.md

@@ -33,3 +33,6 @@ Use Plugin: [tableExport.jquery.plugin](https://github.com/hhurz/tableExport.jqu
 * type: Object
 * description: export [options](https://github.com/hhurz/tableExport.jquery.plugin#options) of `tableExport.jquery.plugin`
 * default: `{}`
+
+### Icons
+* export: 'glyphicon-export icon-share'

src/extensions/filter-control/README.md

@@ -42,6 +42,9 @@ Dependence if you use the datepicker option: [bootstrap-datepicker](https://gith
 * description: Set to true if you want to use the strict search mode.
 * default: `false`
 
+### Icons
+* clear: 'glyphicon-trash icon-clear'
+
 ## Events
 
 ### onColumnSearch(column-search.bs.table)