Add filterType and filterOptions property for Column

Proposed change:

* add `filterType` and `filterOptions` to `Generator/Column.php`
* for filtersBuilder, if set, use `filterType` and `filterOptions`
* not set -> fallback to current functionality
    * fieldguesser->getFilterType()
    * fieldguesser->getFilterOptions()

However.. this does not work. I'm still getting my `formType` and `formOptions` (on list filters) instead of `filterType` and `filterOptions`.

@cedriclombardot @sescandell @neoshadybeat any idea why this is not working / what am I missing?