Base ics_cobraCharmer installation on sconsUtils

The ics_cobraCharmer installation is a bit peculiar. The two main quirks are that MP expects it to be installed as a simple standalone python product (I think that is a reasonable request), and that much of the new python code is in a `procedures` directory which is not located in the way most python modules are.

One way to address both is to switch to an sconsUtils-style build (as many other ICS products already have). That will be invisible to the vanilla python installed, so we will not break that.

Yes, we need to place `procedures` better, but I think we should put that off for now.