Kaucher interval tracker

[leslieDLcy]

Refactor progress

• Iterator not needed.

• Map function changed into a private function (_map())

• Added numpy support for unary functions

x=Kaucher(2, 4)
np.sin(x)
np.exp(x)

• constructors k. Line 915

• Refactored equal.

Questions

• what will imposition and envelop mean for Kaucher intervals?

Oct 6th

• getter and setter