CDS detector added

Former-commit-id: 93fac7a70052d06c2a12bf8af59820c653edd31b
Former-commit-id: 0869fdad0f550941a0f78f1e4c57f4fcdb3f6076

detectors/cds/lib/subdb.awk

@@ -0,0 +1,20 @@
+#
+# select subDB from fasta DB
+#
+# -v FILE
+
+BEGIN {
+  if (FILE == "") FILE = "dbsel.txt"
+  while (getline < FILE)
+    INC[$1] = $1
+  close(FILE)
+}
+
+/^>/ {
+  name = substr($1, 2)
+  ok = name in INC
+}
+
+ok {
+  print $0
+}