0028347: Reuse OCCT implementation for producing end-user documentation for Products
Updated destination directory for generated by gendoc proc pdf files.
Added additional option "-update_images_size" for gendoc procedure to update width of images in *.md files during pdf generation for @figure alias.
Documentation was updated to use alias @figure instead of outdated @image
Added support of svg image format in procedure OCCDoc_UpdateImagesSize.
Added generation of overview for product components.
Added generation of products refman/chm for each component.