Cursewords

First full minor release! :tada:

Brand new to this release, we've got:
* bug fixes and performance improvements
* print mode, to enable plain text rendering of puzzles and clues
* support for new-style .puz files (including full Unicode support)
* and a jaunty emoji included in puzzle complete notice

That's combined with a bunch of brand new stuff from from the last few releases, including:
* bug fixes and performance improvements
* Windows compatibility
* better support for cryptic-style puzzles and unchecked squares
* shift-arrow keys
* delete/backspace key behavior updates
* and more!

* tiny bugfix: typo in `1.0.8` release could cause crashes on certain kinds of navigation

* Improved handling of unchecked squares (which are seldom found in U.S.-style crosswords, but very common in cryptics). In earlier versions, displaying clues for or navigating through unchecked squares in certain ways could cause crashes, but that should no longer be the case.
* Introducing `shift-arrow` navigation for cruising through the grid perpendicular to your cursor direction. That was (and remains) available using the `[` and `]` keys, but `shift-left`, `-right`, `-up`, and `-down` now behave pretty intuitively.
* Should have Windows support now! This only required using a (slightly) newer version of `blessed`, but I've been told it works.

- a bit of refactoring by hazel-nut (thank you!)
- small bug fix for the display of cells that have been both `check`ed and `reveal`ed
- (1.0.5) change minimum width to better display clues on narrow puzzles such as minis

* bug fix: update `puzpy` dependency to fix an issue that could cause crashes on save for some .puz files

Changes:
* include manifest file so that `requirements.txt` is shipped in the source release