changes to class Config and QE

[Henrik Nordberg <HNordberg@lbl.gov>]

Hello,

I added a function bool is_ok() to class Config. It returns true if the
configuration was successfully read.
The file in which the class is defined should now compile with ospace
STL. I replaced #include <pair.h> with #include <utility> which is where
the pair<> template and make_pair() function should be defined.

The QE was also updated and copied to LaunchGCA. The code was cleaned up
a bit (I purchased a copy of CodeWizard and Insure++) and some bugs were
fixed.

Best regards, Henrik