Refgenconf

Fixed

- warning in `seek` method when executed with `strict_exists=None`

Added

- in `pull` the genome description is fetched from the server

Added

- `force_large` argument in the `pull` method, which can be used to handle large archive downloads
- `add` method

Changed

- `getseq` method returns the sequence string instead of printing it to the screen

Deprecated

- `get_remote_data_str` method. Use `listr` instead

Changed

- `pull` so it does not remove asset after overwrite decision, wait for the archive download to finish
- file locking mechanism enhancements

Added

- plugins functionality

Changed

- dropped Python 2 support

Removed

- preciously deprecated `get_asset` method. Use `seek` instead

Added

- `RefGenConf` methods update the file on disk that's bound to the object if one exists
- `seek` method. Works similarily to `get_asset`, but does not check for asset file existence on disk by default.

Changed

- `RefGenConf` method names to match the `refgenie` (CLI) terminology
- `remove_assets` to `remove`
- `asset_dict` to `list`
- `list_remote` to `listr`
- `tag_asset` to `tag`
- `pull_asset` to `pull`
- `get_asset_digest` to `id`
- `get_asset` to `seek`. Moreover the file existence

Deprecated

- `get_asset` method. Use `seek` instead