#24 STELConfiguration - after review 07/12

[Marek Gibek]

After code review I found below errors:

- missing
STELConfiguration::set_STELIPInterface(CGStringSync left)
method

- missing "else" statements in method
STELConfiguration::parse_buffer()

- string
"CEXIPInterface" instead of "multithread" makes function not
recognizing "multithread" attribute