Batch file to count number of lines in all CPP's

Batch file outputs the number of lines in all *.cpp files in the
GameEngine structure.
Nothing special
Specified a macro for simplified use of Config

The macro GET_CONFIG_VALUE uses Config class to get configuration
values. The macro simplifies usage of Config class in the game engine.
GET_CONFIG_VALUE in DEBUG mode actually reads two configuration values:
one to specify the default value and one which actually sets the
parameter.
Refactoring. Started using GET_CONFIG_VALUE macro

Refactoring and started using GET_CONFIG_VALUE macro for easier reading
of configuration values.