ALL THE THINGS

So I did a bunch of things: 
- Filtering of the checkouts and reservation page
- Convert all isbn9 -> isbn10
- Convert all isbn10 -> isbn13
- Stopped doing 2 google books searches when adding a book. 
- `google_book_data.img_small != ""` is now `google_book_data.img_small.present?`
- updated the seeds file to use `Book.add_by_isbn`
- added the rake task to add lcc when they aren't set
- added searching by author
- used the googlebooks api key to `Book.add_by_isbn`