v0.7.2

Added

• Added ability of creating custom reducers using pw.reducers.udf_reducer decorator. Use pw.BaseCustomAccumulator as a base class
  for creating accumulators. Decorating accumulator returns reducer following custom logic.
• A function pw.debug.compute_and_print_update_stream that computes and prints the update stream of the table.
• SQLite input connector (pw.io.sqlite).

Changed

• pw.debug.parse_to_table is now deprecated, pw.debug.table_from_markdown should be used instead.
• pw.schema_from_csv now has quote and double_quote_escapes arguments.

Fixed

• Schema returned from pw.schema_from_csv will have quotes removed from column names, so it will now work properly with pw.io.csv.read.