Some docs on how the CommandProcessor works

## Uncomment the test function in CommandProcessorDriver.cpp
```
int main(int argc, char *argv[], char **)
{
   testCommandProcessor(argc, argv);
   return 0;
}
```

## Terminal commands
Run the command processor with a file (text input as opposed to console input)
```
cd build
./HelloWorld -f ../src/tester.txt
```