COBIA initialization diagnostics

[jasper]

On some systems, particularly during installations, typically cobiaRegister (or wCobiaRegister) fails with the message "CAPE-OPEN initialization fails".

Several attempts to debug this after-the-fact have failed, either because the problem is not reproducible on my computer after transferring all target files, or because the problem spontaneously corrects itself.

I suggest to put in place better textual error messages about why COBIA fails - e.g. report on failure to load the COBIA core DLL (with path to the DLL and error code), report on failure to load any of the function pointers, etc.