diff --git a/rhodecode/lib/__init__.py b/rhodecode/lib/__init__.py
--- a/rhodecode/lib/__init__.py
+++ b/rhodecode/lib/__init__.py
@@ -66,6 +66,34 @@ ADDITIONAL_MAPPINGS = {'xaml': 'XAML'}
 
 LANGUAGES_EXTENSIONS_MAP.update(ADDITIONAL_MAPPINGS)
 
+# list of readme files to search in file tree and display in summary
+# attached weights defines the search  order lower is first
+ALL_READMES = [
+    ('readme', 0), ('README', 0), ('Readme', 0),
+    ('doc/readme', 1), ('doc/README', 1), ('doc/Readme', 1),
+    ('Docs/readme', 2), ('Docs/README', 2), ('Docs/Readme', 2),
+    ('DOCS/readme', 2), ('DOCS/README', 2), ('DOCS/Readme', 2),
+    ('docs/readme', 2), ('docs/README', 2), ('docs/Readme', 2),
+]
+
+# extension together with weights to search lower is first
+RST_EXTS = [
+    ('', 0), ('.rst', 1),('.rest', 1),
+    ('.RST', 2) ,('.REST', 2), 
+    ('.txt', 3), ('.TXT', 3) 
+]
+
+MARKDOWN_EXTS = [
+    ('.md', 1), ('.MD', 1),
+    ('.mkdn', 2), ('.MKDN', 2),
+    ('.mdown', 3), ('.MDOWN', 3),
+    ('.markdown', 4), ('.MARKDOWN', 4)
+]
+
+PLAIN_EXTS = [('.text', 2),('.TEXT', 2)]
+
+ALL_EXTS = MARKDOWN_EXTS + RST_EXTS + PLAIN_EXTS
+
 
 def str2bool(_str):
     """
@@ -195,6 +223,9 @@ def safe_str(unicode_, to_encoding='utf8
     :rtype: str
     :returns: str object
     """
+    
+    if not isinstance(unicode_, basestring):
+        return str(unicode_)
 
     if isinstance(unicode_, str):
         return unicode_