add license (public domain). fixes #100

I don't have CLAs from everyone involved (it's an IRC bot), but almost all
the core code was written by me and should be safe.

LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

README.creole

@@ -14,4 +14,7 @@
 * Easy plugin development with automatic reloading and a simple hooking API.
 
 ==Requirements==
-Skybot runs on Python 2.6. Many of the plugins require [[http://codespeak.net/lxml/|lxml]]. It is developed on Ubuntu 9.10 with Python 2.6.4.
+Skybot runs on Python 2.6. Many of the plugins require [[http://codespeak.net/lxml/|lxml]]. It is developed on Ubuntu 9.10 with Python 2.6.4.
+
+==License==
+Skybot is public domain. If you find a way to make money using it, I'll be very impressed.