Be nicer with backward compat on config files (#102)

Author: martinRenou

empack/file_patterns.py

@@ -21,7 +21,7 @@ def match(self, path):
 
 
 class FileFilter:
-    def __init__(self, exclude_patterns=None):
+    def __init__(self, include_patterns=None, exclude_patterns=None):
         def patter_from_dict(**d):
             if "pattern" in d:
                 return UnixPattern(**d)

tests/empack_test_config.yaml

@@ -1,4 +1,6 @@
 default:
+  include_patterns:
+    - pattern: '**/*.py'
   exclude_patterns:
     - pattern: '**/*.pyc'
     - pattern: '**/tests/**/*.py'