fix license, add acknowledgements

LICENSE

@@ -1,6 +1,22 @@
 MIT/X Consortium License
 
-© 2020 phillbush
+© 2020 Phillip Bushee <phillbush@cock.li>
+
+thingmenu:
+© 2011 Christoph Lohmann <20h@r-36.net>
+© 2011 Stephen Paul Weber <singpolyma@singpolyma.net>
+
+dmenu:
+© 2006-2019 Anselm R Garbe <anselm@garbe.ca>
+© 2006-2008 Sander van Dijk <a.h.vandijk@gmail.com>
+© 2006-2007 Michał Janeczek <janeczek@gmail.com>
+© 2007 Kris Maglione <jg@suckless.org>
+© 2009 Gottox <gottox@s01.de>
+© 2009 Markus Schnalke <meillo@marmaro.de>
+© 2009 Evan Gates <evan.gates@gmail.com>
+© 2010-2012 Connor Lane Smith <cls@lubutu.com>
+© 2014-2020 Hiltjo Posthuma <hiltjo@codemadness.org>
+© 2015-2019 Quentin Rameau <quinq@fifth.space>
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),

README.md

@@ -26,6 +26,8 @@ XMenu comes with the following features:
 * Separators (menu entries can be separated by a line).
 * Icons (menu entries can be preceded by an icon image).
 * X resources support (you don't need to recompile xmenu for configuring it).
+* Multi-head (xmenu supports multiple monitors by using Xinerama).
+* Type-to-select (you can select an item by typing part of its name).
 
 
 ## Files
@@ -75,3 +77,12 @@ simple menu with submenus and separators.  The file `./demo.gif` shows how
 the menu generated by that script looks like.
 
 Read the [manual](https://github.com/phillbush/xmenu/wiki) for more information on running XMenu.
+
+
+## Acknowledgements
+
+* [thingmenu](https://github.com/singpolyma/thingmenu) for being the base
+  for xmenu's code.  However, xmenu evolved enough that it no longer resambles
+  thingmenu at all.
+* [dmenu](https://tools.suckless.org/dmenu/) for inspiring the stdin-to-stdout
+  interface, and being base for drawing routines and input method code.