Removed debug statements that were no longer needed.
Many instances of debug code had been added to supplement debugging of older issues. Once the issues were resolved the debug code was kept in the event that it was needed again. Now with the clean up of the release 1.0 underway, many of these old debug codes have been removed since they are no longer needed.
Since attentuation and path_length are public member variables in the header wave_front.h, accessors are not needed.
Removed missed include statement on ublas_special.h