Add 'Installation' section to README

README.md

@@ -3,18 +3,16 @@
 
 Cardie is a multi-protocol chat program based on [Caya](https://github.com/Augustolo/Caya).
 
-It can use native protocol add-ons and protocols supported by libpurple, the
-library used by [Pidgin](https://pidgin.im/).
+![Screenshot](data/screenshots/update-3.png)
 
-Protocols natively supported are:
-- IRC
-- XMPP
+It can use protocols through native add-ons as well as through libpurple,
+the library used by [Pidgin](https://pidgin.im/).
+
+Protocols natively supported include IRC and XMPP.
 
 Protocols generally supported through libpurple include GroupWise, Zephyr, and
 [others through plugins](https://pidgin.im/plugins/?type=Protocol).
 
-![Screenshot](data/screenshots/update-3.png)
-
 
 ## Building
 You can make Cardie and its protocols with:
@@ -30,6 +28,15 @@ Cardie itself requires the `expat_devel` package, the XMPP protocol requires
 `glib2_devel`― though it's worth noting that libpurple doesn't work on x86_gcc2.
 
 
+## Installation
+Protocol add-ons can be installed in any add-ons directory under `cardie`
+(i.e., `~/config/non-packaged/add-ons/cardie/`) or in the binary's CWD
+(`./cardie/`).
+
+libpurple plugins can be installed to any lib directory under `purple-2`
+(i.e., `~/config/non-packaged/lib/purple-2/`).
+
+
 ## License
 Cardie itself is under the MIT license, but licenses vary for the included
 libraries and add-ons.