Make a working "Growing Progress" Card

[djpetti]

This card will be the main interface through which we manage actual plant growth. It should allow for the following:

• The user to add or remove a particular type of plant.
• The user to see, at-a-glance the status of a particular plant type.

Note that this is actually really two tasks, which can be worked on separately. Someone can do the JS frontend work, and someone else can do the backend, which, in this case, is not trivial.