RF: add informative message when check-files is OK

Also return something that could be used as an error code.

Author: matthew-brett

nisext/testers.py

@@ -312,8 +312,13 @@ def check_files(mod_name, repo_path=None, scripts_sdir='bin'):
         shutil.rmtree(install_path)
     if lib_misses:
         print "Missed library files: ", ', '.join(lib_misses)
+    else:
+        print "You got all the library files"
     if script_misses:
         print "Missed script files: ", ', '.join(script_misses)
+    else:
+        print "You got all the script files"
+    return len(lib_misses) > 0 or len(script_misses) > 0
 
 
 def get_sdist_finder(mod_name):