echat - feature-rich chatbox

1. Added Lyn Admin Mod support
2. Autocomplete logic for commands has been changed. A command hint is now always displayed to view the command's arguments
3. The autocomplete window has been resized to fit the width of the chat window
4. The font size in the autocomplete window has been increased
5. Removed fade animation for the autocomplete box to eliminate flickering while typing.
6. Updated esclib

Affected files:

1. echat/lua/echat/core/complete_helpers.lua
2. echat/lua/echat/config/config.lua
3. echat/lua/echat/core/__core_build__.lua
4. echat/lua/echat/core/tools/auto_complete.lua
5. echat/lua/echat/vgui/echat_text_entry.lua
6. echat/lua/echat/vgui/echat_dmenu.lua