Version 1.9.1

Release 1.9.1 ( 2018-04-09 )

• When decorating a function with @cache_region decorator the function generated to update the cached value
  will be named like the decorated function. So that during debugging it's easy to know which function is involved.
• Removed usage of async as a variable in code, this fixes a compatibility problem with Python 3.7 where it's a keyword.
• Fixed a race condition in FileNamespaceManager.
• ext.database backend will now properly close connections.
• Do not leave bhind corrupted files if FileNamespaceManager is interrupted while writing a new file.
  Replacing content of a file or writing a new one is now always an atomic operation.
• DBMNamespaceManager and FileSynchronizer will now deal with directories disappearing while they try to write to them.
• The Redis and MongoDB backends are not exposed in documentation.