commit: Change name error to warning and fix output

If a file on the command line does not conform to the naming scheme,
warn about it, but don't abort. Usefull e.g. in cases of 'commit *' or
similar.
Changes behaviour from d5765fbe
See #75

"Hazard: multiple exams with same name" gets it's output about which
exams are affected.
Fixes #76

Change warning color to yellow.

bin/commit

@@ -285,9 +285,8 @@ def allExams():
       n=klausurarchiv.namingscheme.New(fn)
     except:
       if not fDirectory:
-        print("\x1b[31;1mError\x1b[30;0m: %s does not conform to naming "
-          "scheme!"%(fn))
-        exit(1)
+        print("\x1b[31;1mWarning\x1b[30;0m: %s does not conform to naming "
+          "scheme. Skipping!"%(fn))
       continue
 
     if os.path.isdir(fn):
@@ -482,6 +481,8 @@ for base, ns, items in sorted(all_exams,key=lambda i:i[1].lectures):
         output+=("  \x1b[32;1mnon-existent\x1b[30;0m                     %s\n"%item)
     
     if hasSimilar:
+      sys.stdout.write(output)
+      output=""
       sys.stdout.write(
         "\x1b[33;1mHazard\x1b[30;0m: "
         "There are multiple exams with the same name.\n"