Argument Functions for Mocha

Note that certain string functions may be helpful in parsing arguments.

string args.first;: Returns the first argument from the arguments args (e.g., "give 3 coins beggar" has first argument "coins").
string args.second;: Returns the second argument from the arguments args (e.g., "give 3 coins beggar" has second argument "beggar").
integer args.number;: Returns the number from the arguments args (e.g., "give 3 coins beggar" has the number 3). If no number was specified in args, returns the value nothing.