Chanfig

Commits
- 8d5535d: add post (Zhiyuan Chen)

Commits
- a769a6d: add hash for Variable (Zhiyuan Chen)

Commits
- e370169: add iter & next support to Variable (Zhiyuan Chen)

Commits
- 6233496: fix NestedDict won't work with out pytorch (Zhiyuan Chen)

Commits
- f51622c: reorganise code (Zhiyuan Chen)
- e36b9d2: explicit ignore _ipython_canary_ in __missing__ (Zhiyuan Chen)
- 2372f9d: fix value in config file overrided by default (Zhiyuan Chen)

Commits
- f890fc9: fix Chinese website (Zhiyuan Chen)
- 436ee49: manually reorganise methods in docs (Zhiyuan Chen)
- 7f0454d: combine README & index (Zhiyuan Chen)
- 824061e: add unlicense (Zhiyuan Chen)
- 402bfd1: remove module docstring (Zhiyuan Chen)
- c6a443c: use typing.Mapping instead of collection.abc (Zhiyuan Chen)
- 09a82e5: add more type hints for variable (Zhiyuan Chen)
- 8a2ab18: allow parse None as default in get/pop (Zhiyuan Chen)
- d7b9e46: add wrap and unwrap for Variable (Zhiyuan Chen)
- 0d4fa6b: update docs of utils (Zhiyuan Chen)
- badde32: change base class of FlatDict to dict, support non-str key (Zhiyuan Chen)
- 16ee263: reorganise code (Zhiyuan Chen)