Channels

[w0de]

First pass at implementing "channels" to allow variation in promotion schedule. Looking for feedback @ChefAustin - a solution to #25

[ChefAustin]

Looping in @erikng for his thoughts, too.

[erikng]

The main function returns an int and a float. Perhaps you should round the float to an integer so the type is static?

[w0de]

The main function returns an int and a float. Perhaps you should round the float to an integer so the type is static?

The function always returns a float. It is important that is is a float, since this implementation expects <1.0 for faster channels. (The promotion period is a function of the channel multiplier, a multiplier of 0.5 will result in a half-length promotion period.)

[erikng]

The function has a return 1

[w0de]

The function has a return 1

Haha, good point. I'll make that a float.