added windows detailed instructions

Author: psifertex

readme.md

@@ -14,3 +14,13 @@ Binary Ninja is cross-platform and can run on Linux, Mac OS X, Windows, and Free
 
 You can start Binary Ninja by running `binja.py` in the Python interpreter.
 
+### Windows Step-by-step Instructions
+
+* Install the latest [Python 2.7](https://www.python.org/downloads/).
+* In a command-prompt, run:
+    cd \Python27\Scripts
+    pip install PySide
+    easy_install http://www.voidspace.org.uk/downloads/pycrypto26/pycrypto-2.6.win32-py2.7.exe
+* Install [SourceTree](http://www.sourcetreeapp.com/download/) or [GitHub for Windows](https://windows.github.com/)
+* Clone `https://github.com/Vector35/binaryninja-python` to a local folder using whichever tool you installed.
+* Run `binja.py` from the directory you cloned the source code into