Added selection methods.

Reviewed by me.

AppKit/NEWCPTableView.j

@@ -79,6 +79,9 @@ CPTableViewSelectionHighlightStyleSourceList = 1;
     unsigned    _currentHighlightedTableColumn;
 
     unsigned    _numberOfRows;
+
+    CPIndexSet  _selectedColumnIndexes;
+    CPIndexSet  _selectedRowIndexes;
 }
 
 - (id)initWithFrame:(CGRect)aFrame
@@ -113,6 +116,9 @@ CPTableViewSelectionHighlightStyleSourceList = 1;
 _cachedDataViews = { };
         _intercellSpacing = _CGSizeMake(0.0, 0.0);
         _rowHeight = 24.0;
+
+        _selectedColumnIndexes = [CPIndexSet indexSet];
+        _selectedRowIndexes = [CPIndexSet indexSet];
     }
 
     return self;
@@ -399,27 +405,75 @@ _cachedDataViews = { };
 {
     var index = [self columnWithIdentifier:anIdentifier];
 
-    if (index < 0)
+    if (index === CPNotFound)
         return nil;
 
     return _tableColumns[index];
 }
 
 //Selecting Columns and Rows
+- (void)selectColumnIndexes:(CPIndexSet)columns byExtendingSelection:(BOOL)shouldExtendSelection
+{
+    if (shouldExtendSelection)
+        [_selectedColumnIndexes addIndexes:columns];
+    else
+        _selectedColumnIndexes = [columns copy];
+}
+
+- (void)selectRowIndexes:(CPIndexSet)rows byExtendingSelection:(BOOL)shouldExtendSelection
+{
+    if (shouldExtendSelection)
+        [_selectedRowIndexes addIndexes:rows];
+    else
+        _selectedRowIndexes = [rows copy];
+}
+
+- (CPIndexSet)selectedColumnIndexes
+{
+    return _selectedColumnIndexes;
+}
+
+- (void)selectedRowIndexes
+{
+    return _selectedRowIndexes;
+}
+
+- (void)deselectColumn:(CPInteger)aColumn
+{
+    [_selectedColumnIndexes removeIndex:aColumn];
+}
+
+- (void)deselectRow:(CPInteger)aRow
+{
+    [_selectedRowIndexes removeIndex:aRow];
+}
+
+- (CPInteger)numberOfSelectedColumns
+{
+    return [_selectedColumnIndexes count];
+}
+
+- (CPInteger)numberOfSelectedRows
+{
+    return [_selectedRowIndexes count];
+}
+
 /*
-    * - selectColumnIndexes:byExtendingSelection:
-    * - selectRowIndexes:byExtendingSelection:
-    * - selectedColumnIndexes
-    * - selectedRowIndexes
-    * - deselectColumn:
-    * - deselectRow:
-    * - numberOfSelectedColumns
-    * - numberOfSelectedRows
-    * - selectedColumn
+- (CPInteger)selectedColumn
     * - selectedRow
-    * - isColumnSelected:
-    * - isRowSelected:
-    * - selectAll:
+*/
+
+- (BOOL)isColumnSelected:(CPInteger)aColumn
+{
+    return [_selectedColumnIndexes containsIndex:aColumn];
+}
+
+- (BOOL)isRowSelected:(CPInteger)aRow
+{
+    return [_selectedRowIndexes containsIndex:aRow];
+}
+/*
+- (void)selectAll:
     * - deselectAll:
     * - allowsTypeSelect
     * - setAllowsTypeSelect: