Add support for AWS Tools Profile.

http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html

themes/base.theme.bash

@@ -352,3 +352,11 @@ if [ ! -e $BASH_IT/plugins/enabled/battery.plugin.bash ]; then
 	echo -n
     }
 fi
+
+function aws_profile {
+  if [[ $AWS_DEFAULT_PROFILE ]]; then
+    echo -e "${AWS_DEFAULT_PROFILE}"
+  else
+    echo -e "default"
+  fi
+}