Licence and readme

 * Added the COPYING file with MIT Licence text.
 * Updated README, mentioned new GPIO drivers.

COPYING

@@ -0,0 +1,7 @@
+Copyright (C) 2012 Artem Borisovskiy (bytefu@gmail.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+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 OR COPYRIGHT HOLDERS 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.

README

@@ -1,5 +1,17 @@
-Cross-platform library for LCDs with HD44780-compatible controller.
-The library is designed to allow you to write drivers for your hardware
-platform without rewriting the library itself. There is only STM32F10x
-driver at the time. Originally, this was direct port of LiquidCrystalExt
-library for Arduino, from C++ classes to plain C functions and structures.
+Cross-platform library for LCDs with HD44780-compatible controllers written in
+pure C99 (C 1999 year standard). The library is designed to allow you to write
+GPIO drivers for your hardware platform without rewriting the library itself,
+thus making it truly platform independent.
+
+Originally this was a direct port of LiquidCrystalExt library for Arduino,
+from C++ classes to plain C functions and structures, but now it only
+resembles the original interface and is quite different inside.
+
+At the moment there are several GPIO drivers available for the following
+microcontroller families:
+ * STM32F10x
+ * STM32F2xx
+ * STM32F4xx
+ * STM32L1xx
+
+More will be added in the future.