v2.11

• Dropping support for all versions of Python older than 3.5.
• Added sia form (ASCII only SI scale factors).
• Added only_e_notation argument to Quantity.all_from_conv_fmt().
• Added Quantity.reset_prefs() method.

v2.10

• Added negligible, tight_units, nan, and inf preferences.
• Added negligible argument to render.
• Added infinity_symbol attribute.
• Changed the return values for Quantity.is_nan() and Quantity.is_infinite().

v2.9

• Made Quantity.extract() more forgiving.
• Support radix and comma processing when converting strings to Quantity.

v2.8

• Fix nit in installer (setup.py).

v2.7

• improve the ability of both quantiphy.Quantity.add() and quantiphy.Quantity.scale() to retain attributes.
• added accept_binary preference.
• support all preferences as class attributes.
• allow radix and comma to be replaced by adding radix and comma preferences.

v2.6

• now support Quantity arguments with Quantity.extract().
• allow plus and minus signs to be replaced with Unicode equivalents.

v2.5

• added RKM codes example.
• added check_value = 'strict' to quantiphy.Quantity.add().
• added backward compatibility for form argument of quantiphy.Quantity.render() if it is passed as unnamed argument.
• made quantiphy.Quantity.extract() a bit more general.
• reformulated exceptions.
• added support for binary scale factors and quantiphy.Quantity.binary().

v2.4

• fixed bug in format that resulted in several format codes ignoring width
• follow Python convention of right-justifying numbers by default.
• add Quantity.add() (adds a number to a quantity returning a new quantity)
• added # alternate form of string formatting.
• Change show_si to form (argument on Quantity.set_prefs() and Quantity.render()
• Added concept of equivalent units for unit conversion to documentation.
• Enhance UnitConversion so that it supports nonlinear conversions.

v2.3

• enhanced Quantity.extract()
  • non-conforming lines are now ignored
  • values may be expressions
  • values need not be quantities
  • can specify a quantity name distinct from dictionary name
• enhanced the formatting capabilities.
  • added center alignment
  • added p format
  • added show_commas preference.
  • added strip_zeros, strip_radix to Quantity.render()
  • added Quantity.fixed() method
  • added Quantity.format() method
  • support any format specifier supported by Python for floats

v2.2

bump version to 2.2