Add exit codes

Author: Maumagnaguagno

Hype.rb

@@ -77,5 +77,6 @@ def compile(domain, problem, type = 'rb')
     end
   rescue
     puts $!, $@
+    exit(2)
   end
 end

Hypertension_U.rb

@@ -133,8 +133,10 @@ def problem(state, tasks, debug = false, max_plans = -1, min_prob = 0, ordered =
     @plans
   rescue Interrupt
     puts 'Interrupted'
+    exit(130)
   rescue
     puts $!, $@
+    exit(2)
   end
 
   #-----------------------------------------------