Dialogy

- [x] docs: Better error message for -- `DucklingPlugin` comparison requires reference time to be unix timestamp.
- [x] fix: `DucklingPlugin` doesn't return duplicate entities when a list of strings is input.
- [x] add: `DucklingPlugin` produces a score that can be compared against a threshold.
- [x] fix: `DucklingPlugin` doesn't remove other entities if `datetime_filter` is used.

- [x] fix: 46 `ListEntityPlugin` overwrites if there are mutliple `entity_value` patterns for the same `entity_type`.
- [x] fix: 47 `DucklingPlugin` compares int vs int for `Duckling.FUTURE` and `Duckling.PAST` feature comparison.

- [x] fix: `ListEntityPlugin`
- Now supports a map for entity-type, entity-values for keyword based entities.
- Fixed bug that returns `None` when custom entity classes are required.

- [x] feat: future or past datetime only support from `DucklingPlugin`.

- [x] feat: spacy, pattern entity parsing from list support.
- [x] refactor: Plugin class to prevent repeated code in subclasses.
- [x] refactor: debug -> dbg to prevent name collisions.
- [x] feat: support for building from local git templates optionally, `--vcs` takes `"TAG"` or `"HEAD"`. if the user provides `--vcs` as
`"TAG"`, then `dialogy` takes the template's latest released tag commit. if the user provides `--vcs` as `"HEAD"`, then `dialogy` takes the template's present git branch's recent commit.
- [x] update: **[BREAKING]** `DucklingPlugin` expects the locale from the access method as well.

- [x] feat: `dialogy create <project-name>`, we can drop the template name!
- [x] deprecate: DucklingParser set for deprecation.
- [x] add: DucklingPlugin. ([28](https://github.com/Vernacular-ai/dialogy/pull/28))
- [x] add: DucklingPlugin supports association of [custom entities with dimensions](https://github.com/Vernacular-ai/dialogy/issues/21). ([8d7fbc47](https://github.com/Vernacular-ai/dialogy/commit/8d7fbc47f08da9384add9d850aeadbb08b3de0d9))
- [x] refactor: [DucklingParser had methods that parsed and restructured json](https://github.com/Vernacular-ai/dialogy/issues/26) to be compatible with a certain class structure. This made it hard to execute `BaseEntity.from_dict(duckling_json)`.
These methods are now part of individual `Entity` class. ([28](https://github.com/Vernacular-ai/dialogy/pull/28))