Merge pull request #127 from @xgecko into issue-127

From: https://github.com/xgecko/pystache/commit/a111e91673bcc7c7ec765e6c92aa2395f7e5eafe

This request adds support for loading and locating template files
by file name rather than template name.

Thanks @xgecko!

pystache/loader.py

@@ -120,9 +120,27 @@ class Loader(object):
         return self.unicode(b, encoding)
 
     # TODO: unit-test this method.
+    def load_file(self, file_name):
+        """
+        Find and return the template with the given file name.
+
+        Arguments:
+
+          file_name: the file name of the template.
+
+          search_dirs: the list of directories in which to search.
+
+        """
+        locator = self._make_locator()
+
+        path = locator.find_file(file_name, self.search_dirs)
+
+        return self.read(path)
+
+    # TODO: unit-test this method.
     def load_name(self, name):
         """
-        Find and return the template with the given name.
+        Find and return the template with the given template name.
 
         Arguments:
 

pystache/locator.py

@@ -123,6 +123,13 @@ class Locator(object):
 
         return path
 
+    def find_file(self, template_file, search_dirs):
+        """
+        Return the path to a template with the given file name.
+
+        """
+        return self._find_path_required(search_dirs, template_file)
+
     def find_name(self, template_name, search_dirs):
         """
         Return the path to a template with the given name.