Uttut

1. Introduced `bian` (`edit`) for recording the changing process of sequence.
2. Created `Operators` for sequence modification.
3. Created `Pipe` for connecting a sequence of operators to do sequence transformation.

Merged PRs:
58 46 54 53 56 55 50 48 51 49 47 44 45 42
41 40 38 37 33 35 36 32 34 31 27 21 20 17
16 15 13 14

python
expand_by_entity(
datum,
augment_method,
augment_kwargs,
include_replacements,
include_orig,
)


After:
python
expand_by_entity(
datum,
sampling_method=lambda n_combinations: list(range(n_combinations)),
include_orig=False,
)


- The entities of the returned datum have no replacements.
- `include_orig`

Modify several deployment issue