#118 rewrite commenting system class

[Jayesh Sheth]

Looking at my work on the commenting system class from
a year ago, I realize that it needs to be rewritten.

It uses very odd syntax / programming style within
functions/methods: I jump in and out of PHP mode within
methods, echo values instead of returning them.

Additionally, the code is hard to read, and a bit
disorganized.

This will hopefully be done by 1.0.