new switch --ignore-regex, #862, #865, #868

tests/inputs/issues/862/Fortran77.f

@@ -0,0 +1,6 @@
+C from http://www.roesler-ac.de/wolfram/hello.htm
+C     Hello World in Fortran 77
+
+      PROGRAM HELLO
+      PRINT*, 'Hello World!'
+      END

tests/inputs/issues/862/hello.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+  puts("Hello World!")
+  ;
+  return EXIT_SUCCESS
+  ;
+}

tests/outputs/issues/862/results.yaml

@@ -0,0 +1,26 @@
+---
+# github.com/AlDanial/cloc
+header : 
+  cloc_url           : github.com/AlDanial/cloc
+  cloc_version       : 2.03
+  elapsed_seconds    : 0.0048370361328125
+  n_files            : 2
+  n_lines            : 16
+  files_per_second   : 413.476340694006
+  lines_per_second   : 3307.81072555205
+  report_file        : results.yaml
+'C' :
+  nFiles: 1
+  blank: 1
+  comment: 4
+  code: 5
+'Fortran 77' :
+  nFiles: 1
+  blank: 1
+  comment: 3
+  code: 2
+SUM: 
+  blank: 2
+  comment: 7
+  code: 7
+  nFiles: 2