Add half-adder PLA test
Add majority PLA test
Cleanup pset_familiy/set_family_t* pointer obfuscation
Cleanup pPLA/PLA_t* pointer obfuscation
Cleanup utility.h whitespace
s/ptime/util_cpu_time/
s/print_time/util_print_time/
Get rid of util_print_time usage
Get rid of util_cpu_time usage
Get rid of set_time_limit function
Cleanup sf_equal whitespace
Get rid of mem_usage function
Get rid of s_runtime function
Move sf_equal/print_cover to set.c
Get rid of signature.c
Get rid of runtime function
Cleanup espresso.h
Get rid of total_calls global
Get rid of total_time global
Cleanup pcost/cost_t* pointer obfuscation