Merge pull request #5 from elElmo/master

Basic Implementation of Risk Board, Territory, and Logging Facility
Merge pull request #6 from elElmo/master

Adding Europe, South America, Africa, Asia, and Australia Continents and Validation Fixes
Merge pull request #7 from elElmo/master

Adding sample risk board resource
-added checking and basic commands

-Basic commands such as: help, status, next, territories, attack, fortify, and print
-Checks validity of the command
-Placed the string reader into a function
-imported commands, executing prompt_user()in run_game
commands.promt_user() to risk.commands.prompt_user()