upm: added version changelog

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

README.md

@@ -55,3 +55,5 @@ C/C++ API Documentation
 ==============
 
 The C/C++ documentation is available [here](http://iotdk.intel.com/docs/master/upm/).
+
+Version @ref changelog [here](docs/changelog.md).

docs/changelog.md

@@ -0,0 +1,74 @@
+Changelog                         {#changelog}
+===============
+
+Here's a list summarizing some of the key undergoing changes to our library
+from earlier versions:
+
+### v0.2.0
+
+ * Passed 100 supported sensor drivers
+ * Updated header files with new doxygen tags for improved API documentation
+ generation
+ * Added python examples for sensors
+ * Fixed the buzzer and servo drivers for the Intel Edison
+ * Renamed bmp and gp2y sensor classes to be more generic
+ * Completely revamped implementation for tm1637
+
+### v0.1.9
+
+ * Passed 50 supported sensor drivers
+ * Starter Kit and Additional Roadshow and Hackaton sensors added
+ * Several examples and documentation updates submitted
+ * Wrote new proper SWIG typemaps for arrays
+ * Fixed the i2clcd write function, improved several other sensors
+
+### v0.1.8
+
+ * Added MQ series gas sensors and a few others
+ * Generated Doxygen layout file to improve API look and feel
+ * Several sensor documentation updates
+
+### v0.1.7
+
+ * Fixed SWIG node build issues
+ * Added lpd8806 digital led strip
+
+### v0.1.6
+
+ * Fixed SWIG python builds
+ * Extended i2clcd devices with new functions
+ * Made SWIG interface improvements and added extra types
+ * Added nrf8001 BLE support
+ * Few other sensor additions and fixes
+
+### v0.1.5
+
+ * New drivers for microphone and mpu9150
+ * Added generic driver for stepper motors
+ * Updated all code to use MRAA and version dependency
+
+### v0.1.4
+
+ * Added new bmp/gy pressure sensor and updated servo
+ * Started UPM documentation and related pages
+ * Updated MRAA dependencies
+
+### v0.1.3
+
+ * Updated SWIG support for some sensors
+ * New sensor support for mma7455 accelerometer
+
+### v0.1.2
+
+ * Several new sensors added
+ * Documentation fixes
+ * IPK generation
+
+### v0.1.1
+
+ * Updated MRAA dependency
+
+### v0.1.0
+
+ * Initial release with some basic grove sensors and hmc5883
+ * Doxygen and SWIG support implemented