Closes #105. Adds support for detecting access based on role for the
current user.
#88 a teacher for a sermon shouldn’t be required, and sermons should
have part numbers.
#88 The Connect Menu should have a podcasting section for podcast team
members and the Administrative section should only be accessed by Admin
roles.
#107 Add a podcasting index, to see which sermons still need to be
added to the podcast.