Added signal catching and handling in C and Cython

src/obi_ecopcr.c

@@ -25,6 +25,7 @@
 #include "obiview.h"
 #include "obidebug.h"
 #include "obierrno.h"
+#include "obisig.h"
 #include "obitypes.h"
 #include "obiview.h"
 
@@ -718,6 +719,8 @@ int obi_ecopcr(const char* i_dms_name,
 	int32_t       erri;
 	int32_t		  errj;
 
+	signal(SIGINT, sig_handler);
+
 	if (circular)
 	{
 		circular = strlen(primer1);
@@ -999,6 +1002,9 @@ int obi_ecopcr(const char* i_dms_name,
 		    fprintf(stderr,"\rDone : %f %%          ", p);
 		}
 
+		if (! keep_running)
+			return -1;
+
 		checkedSequence++;
 
 		// Get the taxid