* Convert to multiprocessing worker slave (huge performance)
* Vast memory improvement (esp. for large lists)
* Large scale refactor of *lots* of code
* Better code documentation
* Better site documentation
* Partially validating configuration code
* Partial test framework (to be added to as bugs arise)
* Added configurable update triggers
* Added `never_discard()` to keep certain items indefinitely.
* Added SIGUSR2 signal to output debug backtrace.
* Added state_change_hook
* Added `canto-inspect`, a simple wrapper for examining feed internals
* Added no-content stub for unfetchable feeds to avoid trying to update broken
	URLS repeatedly.
* Added `add_info` extra function for adding content to the reader
* new_hook now enforced by canto-fetch
* Ignore keep settings lower than the number of items in a feed
* tags variably now implicitly set to sane default
* "reader" keybind now doesn't set item read (coupled with "just_read" for
	default)
* Filters and Sorts now all subclass Filter and Sort class
* Accept `conf.py` as well as `conf` for config name.
* Fix double enforcement of rates (client more responsive to fetch updates)
* Fix blank titles
* Fix runhere.sh killing c-f