Add Pantry list - by @ethanmykytiuk

by Ethan, just refactored from
https://github.com/ethanmykytiuk/classproject/blob/pantry-fragment/app/src/main/java/com/cmput301/recipebot/ui/fragments/PantryFragment.java

Couldn't figure out the rebasing.
Merge pull request #45 from f2prateek/pantry-fragment

Add Pantry list - by @ethanmykytiuk

closes 43