Version 1.4.0

1.4.0 - 2020-05-11

Added

• The BiSC algorithm that can tell you what mesh patterns are avoided by a set
  of permutations.

Changed

• Updated __str__ method of Av and MeshPatt.
• Introduce a more efficient algorithm to build permutation in a permutation
  class.

Fixed

• Av([]) returns PermSetAll()

Removed

• Support for Python 3.5 and earlier