Export TermKey instance so CDK can use it for input.
This eliminates the problems caused by libtermkey and CDK having separate input
buffers.
Added configurable tab context menus.
Deprecated `textadept.menu.set_contextmenu()` in favor of new
`textadept.menu.set_contextmenus()`.
Ensure wget uses the correct names when saving dependencies; src/Makefile
Some websites serve packages using strange URLs or have odd names that can
confuse different versions of wget.
Some programs pass lower-case drive letters to external editors; core/args.lua