Notes on the open bugs:

bug001.diderot -- unused variable elimination is removing unused input variables,
		  which changes the command-line interface.

bug007.diderot -- problem with tensor slicing (high-to-mid/high-to-mid.sml:251.41-251.60)

bug009.diderot -- poor error message; might be able to fix this by tricking the
		  repair mechanism into suggesting dummy tokens that have more
		  undertstandable print names (e.g., "type" instead of the
		  specific "vec4").

bug010.diderot -- CFG issue with unreachable exit node

bug013.diderot -- definition of field as strand state variable

bug018.diderot -- use of C keywords as variables: resolve with name mangling for
		  all variables and struct fields in generated code.

bug019.diderot -- feature request: allow a richer syntax of constant expressions
		  (e.g. 1.0/2).

bug022.diderot -- empty sequence not supported yet (simplify/simple.sml:112.34-112.73)

bug023.diderot -- Issue with loading dynamic sequences from files because of the
		  fact that vec3 is represented by vec4 in Diderot.  There are two
		  issues:
		  1) the sizeof(vec3_t) is incorrect for when the sequence comes
		     from a nrrd file.
		  2) reading and writing data needs to be limited to the 3 elements
		     (not four).
		  Problem 1 has been fixed, but we still need to fix problem 2.

bug028.diderot -- missing forms of matrix multiplication; Charisee's work will
		  address this issue

bug029.diderot -- missing code generation for printing matricies and higher-order
		  tensors.  Things should print the way they parse.