Simpler-sf

Added full-path column names for queries with more than two levels of relationship.
Added field aliases with optional object name prefix to post query process fields removal.
Refactored variables in _recursive_unnest for explicitness.
Removed progress bar for single queries.
Added docstring to _smart_query().

Added removal from the output datafame of the additional unrequested fields that are included in the api response in certain conditions.

Fixed a bug in _detect_fields()

For queries that return 0 rows now the dataframe still contains all the columns in the query instead than 0 columns as it was before.