[WIP] Fix for #334 (directories like 'dir.yaml' + recursive search)

Partially reverts a221898 to fix #334

Linked to cpburnz/python-pathspec#41.

.gitignore

@@ -5,3 +5,5 @@ __pycache__
 /yamllint.egg-info
 /build
 /.eggs
+*.yaml
+!*.yaml/

yamllint/conf/default.yaml

@@ -2,8 +2,11 @@
 
 yaml-files:
   - '*.yaml'
+  - '!*.yaml/'
   - '*.yml'
+  - '!*.yml/'
   - '.yamllint'
+  - '!.yamllint/'
 
 rules:
   braces: enable

yamllint/config.py

@@ -32,8 +32,14 @@ def __init__(self, content=None, file=None):
 
         self.ignore = None
 
-        self.yaml_files = pathspec.PathSpec.from_lines(
-            'gitwildmatch', ['*.yaml', '*.yml', '.yamllint'])
+        self.yaml_files = pathspec.PathSpec.from_lines('gitwildmatch', [
+            '*.yaml',
+            '!*.yaml/',
+            '*.yml',
+            '!*.yml/',
+            '.yamllint',
+            '!.yamllint/',
+        ])
 
         self.locale = None
 
@@ -48,7 +54,7 @@ def is_file_ignored(self, filepath):
         return self.ignore and self.ignore.match_file(filepath)
 
     def is_yaml_file(self, filepath):
-        return self.yaml_files.match_file(os.path.basename(filepath))
+        return self.yaml_files.match_file(filepath)
 
     def enabled_rules(self, filepath):
         return [yamllint.rules.get(id) for id, val in self.rules.items()