*********** ver. 0.18.7 *********  2012-07-15  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* Log preamble should have been written by node 0 only.

*********** ver. 0.18.6 *********  2012-06-06  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* A bug has been fixed in the calculation of the unscattered light.

*********** ver. 0.18.5 *********  2012-05-24  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* In OpticalImages, changed the output names "**_inc_**" into "**_unsca_**".
	  "Unscattered" light is probably a better description than "incident" light.

*********** ver. 0.18.4 *********  2012-05-04  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* Fixed HDF5 output of the field-value recorder.

*********** ver. 0.18.0 *********  2012-04-24  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* Added the time-domain NFFFT.

*********** ver. 0.17.0 *********  2012-04-16  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* Random material regions take a shape object as parameter.
	* Waveforms have "waveform_tag"s instead of "tags".
	* MaterialSlabs now takes "material_tag" instead of just "tag".

*********** ver. 0.16.1 *********  2012-04-13  Ilker R Capoglu  <capoglu@angorafdtd.org>
	* Corrected an indexing bug in the movie recorder class.