Custom config object for custom table header.html

[DanielSantiagoDev]

Hi, this is my first issue in github, so:

I downloaded the project and needed to show or hide some columns based on external config:

I can hide the row values simply by using , but I can hide the header.So, I guess I needed a custom header.html, I made it, but I cant pass custom values in order to hide the header value. So I modified the table code to pass a "config" object, just like this: (around line 636)

                 `scope.columns.push({
                        'key': column.key,
                        'name': column.name,
                        'active': active,
                        'sortable': sortable,
                        'class': column.class,
                        'style': column.style,
                        'isSorted': isSorted,
                        'isSortedCaret': isSortedCaret,
                        'config':column.config || {} 
                    });`

Now I can do this to hide the header with a custom header template:

                  `header: [{
                        key:"viewSettings.cache",
                        name:"Cache",
                        config:{
                            hide: function(){return !($scope.activeMode == 'cdm')}
                        }
                    }]`

<th ng-repeat="column in columns track by $index" ng-class="classToShow(column)" ng-style="column.style" ng-click="sortBy(column)" ng-if="!(column.config.hide() == true)">

What do you think?Should I create a pull request with this?

Thank you