Cleanup espresso.h
Use system stdlib
Add return type to cvrin.PLA_labels
Add return type to cvrout.kiss_output
Add return type to cvrout.kiss_print_cube
Add return type to equiv.find_equiv_outputs
Add return type to hack.find_dc_inputs
Add return type to hack.find_inputs
Add return type to hack.form_bitvector
Add return type to hack.map_output_symbolic
Add return type to hack.map_symbolic
Add return type to opo.output_phase_setup
Add return type to pair.pair_all
Add return type to pair.print_pair
Add return type to verify.PLA_permute
control reaches end of non-void function