Remove autocomplete functionality from new_food.php
Change LOGIN_PATH constant to KEYS_PATH
Add sign_out.php file
  -index point to sign_out when user is logged in
  -config.php add path variable
Finish sign_out.php
Make sign_in.php's invalid email error more specific
Change authenticate_user to sign_in_user
Add Twitter Bootstrap
Merge branch 'feature' of https://github.com/Hank-Roughknuckles/meal-planner into feature