Updating README

Author: kaiwa

README.md

@@ -1,4 +1,17 @@
 php_ftdi
 ========
 
-libftdi php extension
+Libftdi PHP extension for talking to FTDI devices.
+
+Build instructions
+------------------
+
+sudo apt-get install libftdi1 libftdi-dev php5-dev
+
+cd /tmp
+git clone https://github.com/kaiwa/php_ftdi.git
+cd php_ftdi
+phpize
+./configure
+make
+sudo make install