Phase 2 commits - not using std::cerr for error output

[Ralf Habacker]

Am 08.08.20 um 05:28 schrieb Prasun Kumar:
> Hi mentors,
> 
> The rest of the work from the second phase has been completed. The databases
> for the additional countries have been incorporated in the library. 
> Please take a look
> and suggest any necessary changes.
> 
> Commits: 
> https://sourceforge.net/u/prasun/ktoblzcheck-gsoc2020/commit_browser

Always use std::cerr for error output, which is not done for example at

AccountNumberCheck::readFile(const string &filename)
{
...
     std::string sql;
     sql = "SELECT country FROM 'institutions' LIMIT 1";
     retcode = 
sqlite3_exec(db,sql.c_str(),AccountNumberCheck::setCountryCallback,this,&zErrorMsg);
     if(retcode){
-        std::cout <<zErrorMsg << std::endl;
+        std::cerr <<zErrorMsg << std::endl;
         throw -1;
     }

Regards
Ralf