getAdvice framework added

Basic framework added for getAdvice; right now it just returns a stock
testing message. Once the format has been figured out, I will actually
make implement our advice algorithm.
getAdvice returns food-history-content

Having difficulties with displaying information, returning food history
currently for testing purposes.
Reverted previous change

I had set getAdvice to return food-history-content in order to test it.
With that done, I have reverted the change.
Testing changes

I am having difficulty getting advice-content to show what I want it
too, though it seems to work when I change it to food-history-content,
indicating that the problem lies elsewhere. This commit is just so I can
keep the git up to date with the changes I have been making just in case
I need to revert.
More getAdvice test changes

Copied getHistory method into getAdvice in order to test display of
data.