Renamed `io.try_encodings` to `io.encodings`; core/file_io.lua
Also refactored encoding detection.
Refactored find and replace all; modules/textadept/find.lua
Lua pattern matching in reverse is now possible.
More code cleanup.
Updated CHANGELOG.md.
Word highlighting is supported in curses; doc/06_AdeptEditing.md
Added tag textadept_6.6_beta for changeset a931a4c8cb27