Updated old documentation.
`_M.textadept = require('textadept')` in user init is superfluous.
The module was being loaded by default anyway. Besides, the user's
modules/textadept/init.lua controls which parts are loaded.
Set language-specific buffer properties through an event instead of a function.
Fixed GTK assertion errors when removing find history items; src/textadept.c
Fix absolute field tags; modules/lua/adeptsensedoc.lua
An absolute field like '_G.events.FILE_OPENED' used to be tagged as belonging to
the 'io' module, but it is tagged properly now.
Fixed misspelling; THANKS.md