Complete pickup page

This pull request contains the code for a functional Pickup page. The page prompts the user to input a pickup day. Then, the app queries the database (the Pickup query in our pseudocode) for all clients picking up on that day and displays all of their information in a table, with a Sign In button which takes the user to the Family Pickup page (which doesn't work yet). 

I hardcoded some data into the view so that once you enter a pickup day, you'll see a table with two rows with some sample data.

Routing to the pickup page is /pickup/. When you click the "Sign In" button, users will be routed to the Family Pickup page, which is routed by /pickup/:client id:/. (For example, the Family Pickup page for a client with client_id 42 would be /pickup/42/). Adding that functionality is my next goal.