Refractoring the MetaModelList to allow manipulation with filters on the fly.

Added: getFilter(), getFilterSetting(),
Added: addFilterRule($objFilterRule)

and minor changes.
fix: return description
Refractoring the MetaModelList to allow manipulation with filters on the fly.

Added: getFilter(), getFilterSetting(),
Added: addFilterRule($objFilterRule)

and minor changes.
Merge pull request #254 from timgatzky/dev

Refractoring the MetaModelList to allow manipulation with filters on the fly.