Starts a new template which must be ended by PS_end_template(3). Templates are similar to macros which
can be placed on a page like images. Within a template one can call any drawing function. Once a template
has been ended by PS_end_template(3) it can be placed on a page by PS_place_image(3). Templates are
commonly used for repeating objects like page headers in order to minimize the document size.
If image reuse is not turned off (since version 0.4.5 of pslib it is always turned on), PS_place_image(3)
may also be called within a template in order to include eps or raster images.