Add column class builder docs.

Author: yajra

documentation.md

@@ -81,6 +81,7 @@
 	- [Table](/docs/{{package}}/{{version}}/html-builder-table)
 	- [Config](/docs/{{package}}/{{version}}/html-builder-config)
 	- [Columns](/docs/{{package}}/{{version}}/html-builder-column)
+	- [Column Builder](/docs/{{package}}/{{version}}/html-builder-column-builder)
 	- [Macro](/docs/{{package}}/{{version}}/html-builder-macro)
 	- [Ajax](/docs/{{package}}/{{version}}/html-builder-ajax)
 	- [Minified Ajax](/docs/{{package}}/{{version}}/html-builder-minified-ajax)

html-builder-column-builder.md

@@ -0,0 +1,38 @@
+# Html Builder - Column Builder
+
+Column Builder is a fluent class that we can use to build our columns.
+
+<a name="upgrading"></a>
+## Upgrading Your Existing Column Definitions
+
+### FROM
+
+```php
+$column = [
+	'name' => 'id',
+	'data' => 'id',
+	'title' => 'Id',
+	'searchable' => true,
+	'orderable' => true,
+	'render' => 'function(){}',
+	'footer' => 'Id',
+	'exportable' => true,
+	'printable' => true,
+];
+```
+
+### TO
+
+```php
+use Yajra\DataTables\Html\Column;
+
+$column = Column::make('id')
+        ->title('Id')
+        ->searchable(true)
+        ->orderable(true)
+        ->render('function(){}')
+        ->footer('Id')
+        ->exportable(true)
+        ->printable(true);
+```
+