Xsi mirror / side select v1

Developed & tested under Xsi 4.0

This set of scripts can be used to speed up selections, when doing symmetry operations/modeling.

When a command is launched the first time, it creates a custom parameter set with the tool settings under the scene root. After the first time, launching the command will perform the operation using the settings found in the custom parameter set.

- Select mirror can mirror the subcomponent selection of a polygon mesh (supports multiple objects with multiple types of sub selections, works with points, edges, polygons).

- Select side can select the subcomponents on a side of a polygon mesh (supports multiple objects, works with points, edges, polygons).