Implement support for imaginary numbers in Scheme

[Katie Burke]

Imaginary numbers and operations on imaginary numbers are not working in scheme. For example, this code should return 7+7i

(+ 3+4i 4+3i)

Traceback (most recent call last):
File "stdin", line 1, col 4
RunTimeError: unbound variable '3+4i'

[Doug Blank]

Using the Calico Scheme in Python, just use (complex i j) from Python.