Update to v0.3.3: support for installing the library, README.md fixups and additions

CHANGELOG

@@ -1,6 +1,11 @@
 Change Log
 ==========
 
+v0.3.3
+------
+- Added the "install" target to Makefile.
+- Small fixups and additions to README.md
+
 v0.3.2
 ------
 - Fixed issue #8 - added memset to clear transfer struct.

Makefile

@@ -47,4 +47,8 @@ interrupt_example: interrupt_example.c
 	gcc -o interrupt_example interrupt_example.c -Isrc/ -L. -lmcp23s17
 
 clean:
-	rm -f $(OBJECTS)
+	rm -f $(OBJECTS)
+
+install: $(BINARY)
+	install src/mcp23s17.h /usr/local/include
+	install $(BINARY) /usr/local/lib

README.md

@@ -1,20 +1,54 @@
 libmcp23s17
 ===========
-A simple library for accessing the MCP23S17 port expander through SPI. See
-`example.c` for ideas on how to use.
+
+A simple library for accessing the [MCP23S17](http://www.microchip.com/MCP23S17)
+port expander through SPI.
+
+Building
+--------
+
+To build the library, use:
+
+    $ make
+
+Install the library to `/usr/local` using:
+
+    $ make install
+
+To test the library, compile and execute the example program:
+
+    $ make example
+    $ ./example
+
+Another example program, using interrupts, is available. Build with:
+
+    $ make interrupt_example
+    $ ./interrupt_example
+
+Usage
+-----
+
+See `example.c` and `interrupt_example.c` for ideas on how to use.
+
+Compile your software with the following flag:
+
+    -lmcp23s17
+
+You can specify the path of the library manually, using:
+
+    -I/path/to/headers -L/path/to/libmcp23s17 -lmcp23s17
 
 Documentation
 -------------
 
-[http://piface.github.io/libmcp23s17](http://piface.github.io/libmcp23s17)
+An online version of the documentation is available at http://piface.github.io/libmcp23s17.
 
-Build the docs with:
+Build it with (assuming that you are in the directory of the cloned repository):
 
-    $ git clone https://github.com/piface/libmcp23s17.git
-    $ cd libmcp23s17/docs/
+    $ cd docs/
     $ doxygen libmcp23s17-doc.conf
 
-To view as HTML, point your browser to `libmcp23s17/docs/html/index.html`.
+To view as HTML, point your browser to `docs/html/index.html`.
 
 To view as PDF:
 

docs/libmcp23s17-doc.conf

@@ -32,7 +32,7 @@ PROJECT_NAME           = libmcp23s17
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.3.0
+PROJECT_NUMBER         = 0.3.3
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer