Minor update to README

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

README.md

@@ -3,7 +3,8 @@ libuev | Micro event loop library
 
 Libuev is a small event library in the style of libevent, the excellent
 libev and the venerable Xt(3) event loop.  The primary target is modern
-embedded Linux systems.
+embedded Linux systems.  For power users, libuev is mainly a convenience
+wrapper for epoll, timerfd and signalfd.
 
 
 Usage
@@ -19,12 +20,17 @@ loop that will only return at program termination.
    3. Enter the event loop with `uev_run()`
    4. Exit the event loop with `uev_exit()`, possibly from a callback
 
-**Note:** Make sure to use non-blocking stream I/O!
+**Note:** Make sure to use non-blocking stream I/O!  Most hard to find
+  bugs in event driven applications is due to file descriptors and
+  sockets being opened in blocking mode.  Be careful out there!
 
 
 Example
 -------
 
+Here is a very brief example to illustrate how one can use libuev.  But
+please, pay more attention to return values than the author did below.
+
     #include "uev.h"
     
     static void signal_cb(uev_ctx_t *ctx, uev_t *w, void *UNUSED(arg), int UNUSED(events))
@@ -57,6 +63,9 @@ Example
         return uev_run(&ctx);
     }
 
+For a more complete, and perhaps more relevant example, see the code for
+the TFTP/FTP server [uftpd](https://github.com/troglobit/uftpd).
+
 
 API
 ---