File to QStringList

Read a file and parse each line to a QStringList:

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```c
QStringList fileToStringList( const QString &fileName, const QString &caller )
{
    QStringList text;
    QFile file(fileName);

    if( !file.open( QFile::ReadOnly | QFile::Text) )
    {
        QMessageBox::warning( 0l, caller, 
                              "Cannot read file "
                              +fileName+":\n"
                              +file.errorString());
        return text;
    }

    QTextStream in( &file );
    while( !in.atEnd() ) text.append( in.readLine() );
    file.close();

    return text;
}
```

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