Merge branch 'master' into patch-1

Author: jbaiter

README.md

@@ -80,6 +80,9 @@ def file_iterator(fpath):
       key, value = line.strip().split()
       yield key, int(value)
 m = Map.from_iter( file_iterator('/your/input/file/'), '/your/mmapped/output.fst')
+
+# re-open a file you built previously with from_iter()
+m = Map(path='/path/to/existing.fst')
 ```
 
 

docs/index.rst

@@ -89,6 +89,8 @@ Examples
           yield key, int(value)
     m = Map.from_iter( file_iterator('/your/input/file/'), '/your/mmapped/output.fst')
 
+    # re-open a file you built previously with from_iter()
+    m = Map(path='/path/to/existing.fst')
 
 API Reference
 -------------