TODO

General:
 * Error handling style is horribly verbose.
     We need a nice monadic style where we can fail with e.g. internal server
     errors without propagating Either blah blah all over the place.
     See for example how we cannot currently abstract over takeRequestBody.

Backup:
 * Implement import for Documentation
 * Reduce space for import (enable garbage collection of more things)
 * Bulk import should create tags and maintainer information automatically
 * Create backup tarballs on a running server
 * Create backup tarballs from selected features so others can set up their own Hackages

Users:
 * Expose renaming for the Users feature
 * Expose user id information for mirrors and e.g. merging accounts with totalNameMap
 * Decide on user registration policy and implement as a new feature (currently, admins register accounts)

Other features:
 * Improve text search, producing more intuitive results in less time
 * Bring BuildReports, Distro up to par with other features

Feature views:
 * Implement JSON views for all the features
 * Split up the HTML feature into smaller subpages
 * Switch to BlazeHTML
 * Use the JSON functionality in-browser for Ajax

HTTP principles:
 * DELETE, PUT, and (in some cases) POST should not redirect, but rather return
     a document indicating the location of the new resource, if necessary, or other
     cues to continue browsing. 

Miscellaneous
 * Catch exceptions for asynchronous variables and hooks
 * Add more links to [ErrorMessage]s throughout the application, particularly with authentication
 * Decide how to coordinate a switchover basic to digest auth
 * Send etag and last modified times, if possible