tag = value
tag2 = value2
tag3 = value3

tag = value
  value continuation
tag2 = value2
  value continuation2
# comment for tag3
tag3 = value3

tag : "valuenvalue continuation"
tag2 : "value2nvalue continuation2"
tag3 : "value3"

while( std::getline( istr, line ) )
{
  ++lineCount;
  if( line[0] == '#' )
    currentComment.push_back( line );
  else if( isspace( line[0]) || line[0] == '' )
    currentComment.clear( );
  else
  {
    auto tag = Utils::string::splitString( line, '=' );
    if( tag.size() != 2 || line[line.size() - 1] == '=')
    {
      std::cerr << "Wrong tag syntax in line #" << lineCount << std::endl;
      return nullptr;
    }
    tagLines.push_back( line );
    currentComment.clear( );
  }
}