Refactor: String callback helper added
Fix string refcounting in context.c
Merge pull request #560 from matthiasbeyer/refactor-deserializer_string_cb

Refactor: String callback helper added
Add ws_socket deinit functionality
Merge pull request #555 from matthiasbeyer/add-socket_deinit

Add ws_socket deinit functionality
Merge pull request #567 from xVin/Fix-refcounting-in-context

Fix string refcounting in context.c