Removed a remaining instance of 'self' from the write() function.
Fixed the grace.write() user function interface.
A few small fixes for the write() function.
Updated the grace.write() user function interface to the new design.
Converted the Grace write() function to the new design.
The pipe argument is now optional for RelaxNoSimError.
Converted the 4 write_*() functions to the new design.
Converted the view() function to the new design.
Converted the get_data() function to the new relax design.
Converted the determine_graph_type() function to the new relax design.