Updated readme

Author: j54n1n

README.md

@@ -1,2 +1,26 @@
 # arduino-libraries
 Reusable generic libraries for Arduino projects
+
+This set of libraries require at least Arduino IDE v1.6.8, where v1.8.1 or newer
+is recommended.
+
+## How to install
+### Manual Installation
+Click on the "Clone or download" button in the upper right corner. Exctract the
+ZIP file, and *move and rename* the extracted folder either to the location
+"**~/Documents/Arduino/libraries**" or to your custom *sketchbook* folder.
+Create the "libraries" folder if it doesn't exist. Open Arduino IDE and a bunch
+of new libraries should show up in the libraries menu.
+
+## Derived Open Source Software
+Portions of this software have been modified from Arduino source that is
+covered by either [L]GPLv2 or [L]GPLv3.  The licensing details are generally
+contained within the files themselves.  However, if there are no licensing
+specifications, it should be treated as being the same as for the Arduino 1.8.1
+environment (and later, as appropriate). It is also available free of charge.
+
+For more information, including trademarks and copyrights and licenses, see
+
+    http://arduino.cc/
+
+as well as the copyright and licenses for the relevant source files.