Add links to registration approval emails
Add basic song finder

This is currently just a list of songs and composers.
Add more notes on the song finder
Add a details page for songs
Add a few more ideas for the song finder page
Link up service plan song tables with song details page
Make the indicator for whether the user is involved in any services accurate
Link to the main service plan editing page

Mostly, people will want to shuffle songs around, not change
who's in the service.
Link song finder up from the service planning pages
Link up CCLI table to song detail
Add a note about composer searching
Calculate song usage from the past year, not all time
Add a page for each composer
Moving getting the song finder breadcrumb trail to a base class
Add a link from the list of when songs were sung to their service plans
Link to the composer page from the song detail page
Add a note about song/composer merging
Include a link to the Song Finder from the services home page
Find songs sung in one service that aren't sung in the other