First alpha of Snippet Expander 1.0.0, a rewrite of Snippet Pixie.

There's still plenty of polish needed, but the basics are working:

* CLI for controlling daemons and managing snippets.
* Daemon that does most of the work, servicing requests from CLI, auto expander, and GUI.
* Auto expander daemon that works with accessible apps to expand snippets while you type.
* GUI for managing snippets, with Search & Paste mode for quick select and paste into non-accessible apps.