Update Readme.md

Author: robotconscience

Readme.md

@@ -1,3 +1,4 @@
+#About
 Rough OF addon that uses turbo-jpeg lib to read and write jpegs. 2-4 times faster than OF's freeImge based jpeg en/decoder.
 
 You will need to install libjpeg-turbo (http://sourceforge.net/projects/libjpeg-turbo/) and its dylibs or freemImage's internal version of libjpeg will conflict with the one required by libjpeg-turbo, throwing a "Wrong JPEG library version: library is 80, caller expects 62" error. Alternatively you can just place the "libturbojpeg.dylib" by the binary and it should work. Only tested on OSX Lion.
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 ![ofxTurboJpeg screenshot](http://farm8.staticflickr.com/7243/6999702551_fc8812d210_z.jpg)
 
+#Compiling
+
+* Visual studio 2015 (instructions by [tgfrerer](https://github.com/tgfrerer))
+  * turboJPEG libraries for vs2015 compiled straight off the sources using the following recipe:
+  * download turbojpeg release:
+    http://sourceforge.net/projects/libjpeg-turbo/files/1.4.1/libjpeg-turbo-1.4.1-vc.exe/download
+  * download nasm (net assembler): http://www.nasm.us/pub/nasm/releasebuilds/2.11.08/win32/nasm-2.11.08-installer.exe
+  * copy nasm.exe into the cmake/bin directory so it ends up in the PATH for the cmd prompt.
+  * use cmake-gui and cmake to build visual studio project files, compile turbojpeg
+  * find turbojpeg-static.lib and it's debug counterpart.
+  * rename the debug .lib to turbojpeg-staticd.lib (note the 'd' for last character)
+  * copy both lib files into the lib folder in the ofxTurboJpeg addon.