overwrite initial mesh field data (with parameter values)

Setting integration point data based on Element IDs based parameter:

    <overwrite_mesh_data>
        <remove>
            <field_name>cell_centres</field_name>
            <mesh_item_type>cell</mesh_item_type>
        </remove>
        <set>
            <field_name>sigma_ip</field_name>
            <mesh_item_type>integration_point</mesh_item_type>
            <material_ids>1 2</material_ids>
            <parameter_name>sigma_bent</parameter_name>
        </set>
        <set>
            <field_name>temperature</field_name>
            <mesh_item_type>node</mesh_item_type>
            <material_ids>1</material_ids>
            <parameter_name>temp_inner1</parameter_name>
        </set>
        <take_original>
            <field_name>temperature</field_name>
            <mesh_item_type>node</mesh_item_type>
            <material_ids>0</material_ids>
        </take_original>
        <set>
            <field_name>temperature</field_name>
            <mesh_item_type>node</mesh_item_type>
            <material_ids>2</material_ids>
            <parameter_name>temp_inner2</parameter_name>
        </set>
        <set>
            <field_name>porosity_avg</field_name>
            <mesh_item_type>cell</mesh_item_type>
            <material_ids>0:2</material_ids>
            <parameter_name>porosity_clay</parameter_name>
        </set>
        <set>
            <field_name>p_left</field_name>
            <mesh>Left</mesh>
            <mesh_item_type>node</mesh_item_type>
            <parameter_name>u_bc</parameter_name>
        </set>
    </overwrite_mesh_data>

Planned feature list:

1. 3 data types: ip-data, cells, nodes
2. level-based (ordered) overwrite
3. original mesh data can be set for any level
4. should work for any of the input meshes
5. elements/ip points may have function type (ip coordinates/ cell center points)
6. wildcards should be allowed for material id selection
7. deleting fields

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1. Tests covering your feature were added?
2. Any new feature or behaviour change was documented?

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