change the way requires_parameters works
add edit link to post_index template
correct the setting of tagList in the save methods of posts_new_controller and post_edit_controller
clean up posts_new_controller
add check for duplicates and empty strings when setting tagList in the save methods of posts_new_controller and post_edit_controller
clean up posts_new template
add another link to post.edit to post_index template (unfortunately, still without named anchor)
creat about template (stub)
add link leading to authentication index to edit user page
clean up router.js