Some improvements

• Yc now accepts logical inputs
• Fixed a bug in Zr with string input when running on Octave
• Xz now allows char array input
• g (logical) now accepts complex input (and uses its absolute value)
• Zv with numeric input now produces symmetric range: 3 -> [1 2 3 2 1]; -3 -> [3 2 1 2 3].
• i can also be used in addition to j for imaginary unit in numerical array literals, user input and in inputs to U