Changes for correct UAF radar handling

Okay I've made a small change to sdio which will allow me to use our existing directory structure here at UAF by setting a couple of environment variables.  If environment variables not set it defaults to the VT dir structure.  I've tested this locally.

I've also adapted the use of the radar naming to allow for constructions such as "mcm.a" and "kod.d" to be passed as the radar name for correct channel handling until we can find the technical solution to merge the files back together into a common file without disrupting data reprocessing or real time display.