Added more FatSecret API functionality

MysteriousTrousers, thanks so much for creating this pod. To use it in my project I had to add the ability to search for recipes and to get specific recipes.

This is my first open-source contribution so hopefully it up to par.
So it looks like there's extras of FSRecipeDirections, FHRecipeIngredients, and FHRecipeImages here that are empty, perhaps you copied them inside the other folder and forgot to delete these ones? Looks like the right ones are in:

`/FatSecretKit/FatSecret`

whereas these blank ones are just inside `/FatSecretKit`