#34 translation (0,0,0) problem in simple API

[Stan Coleby]

From Sarah Molzahn of Faro
The standard says that a transformation consists of a rotation and translation. The “rigidBodyTranform” object consists of a rotation and a translation. If we are going to export a transformation consisting of a rotation and a translation (0, 0, 0), the translation won’t be written into the e57 file because the “Structure Node” will not be created if the translation is (0, 0 ,0). Hence, the translation node is not available in the xml-part of the e57 file.