Changes in InL2,IfB2 and IneB2.

Have made changes regarding the redundancy of multiplcation with factor and changing the code back to using  wdf / (wdf + 1) as discussed on IRC.
Now that `factor` isn't used in `get_sumpart()` or `get_maxpart()` you should be able to get rid of it as a member variable, and just rename the parameter of `init_()` to be `factor`.  Same should be true of the other classes where you've made similar changes.