Various improvements

COMPILE

@@ -23,6 +23,29 @@ samples
 
 HOW TO COMPILE
 ---------------------------------------------------------
+CMAKE USERS
+.........................................................
+If you want to build the shared libraries under Windows using Visual
+Studio, you will have to use CMake version 3.4 or newer. If not, an
+earlier version will suffice. For a traditional out-of-source build
+under Linux, type something like
+
+ $ mkdir build # Create temporary build directory
+ $ cd build
+ $ cmake .. # CMake will determine all the necessary information,
+            # including the platform (32- vs. 64-Bit)
+ $ make
+ $ make install
+ $ cd ..; rm -r build
+
+The default installation directory will be the top source directory,
+i. e. the binaries will go into bin/ and the libraries into lib/. You
+can change this behavior by calling CMake like this:
+
+ $ cmake .. -DCMAKE_INSTALL_PREFIX=/some/path/on/your/system
+
+Under Windows, it is probably easiest to use the CMake GUI interface.
+
 GCC USERS
 .........................................................
 There is a very simple makefile that compiles all libraries and exes