IterTable 2.0 beta

wq.io is now IterTable! This name better reflects the project purpose, and avoids confusion with the wq framework website (https://wq.io). Similarly, IterTable's *IO classes have been renamed to *Iter, as the API is not intended to match that of Python's StringIO or other io classes.

The functionality is otherwise the same as wq.io 1.1.0. Here is a mapping of top-level exports:

old name	new name
wq.io.load_file	itertable.load_file
wq.io.load_url	itertable.load_url
wq.io.load_string	itertable.load_string
wq.io.BaseIO	itertable.BaseIter
wq.io.CsvFileIO	itertable.CsvFileIter
wq.io.CsvNetIO	itertable.CsvNetIter
wq.io.CsvStringIO	itertable.CsvStringIter
wq.io.JsonFileIO	itertable.JsonFileIter
wq.io.JsonNetIO	itertable.JsonNetIter
wq.io.JsonStringIO	itertable.JsonStringIter
wq.io.XmlFileIO	itertable.XmlFileIter
wq.io.XmlNetIO	itertable.XmlNetIter
wq.io.XmlStringIO	itertable.XmlStringIter
wq.io.ExcelFileIO	itertable.ExcelFileIter
wq.io.make_io	itertable.make_iter
wq.io.guess_type	itertable.guess_type
wq.io.flattened	itertable.flattened
wq.io.VERSION	itertable.VERSION
wq.io.*Loader	itertable.*Loader
wq.io.*Parser	itertable.*Parser
wq.io.*Mapper	itertable.*Mapper