doc: Update installation instructions

* OS X: Added `pkg-config`.

* Added instruction specific to Windows.

doc/install.md

@@ -3,10 +3,10 @@
 The instructions to install IJavascript are platform-dependent and very much
 determined by the following dependencies:
 
-- [IPython notebook](http://ipython.org/notebook.html)
 - [ZeroMQ](http://zeromq.org/)
+- [Node.js](http://nodejs.org/)
 - [npm](https://www.npmjs.com/)
-- [node.js](http://nodejs.org/)
+- [IPython notebook](http://ipython.org/notebook.html)
 
 ## Debian and Ubuntu
 
@@ -44,14 +44,14 @@ But note that the above command will install the executable `ijs` in the folder
 `~/node_modules/.bin/` and you may want to add this folder to your `PATH`:
 
 ```sh
-echo \"PATH=\"\$HOME/node_modules/.bin\" >> ~/.profile
+echo \"PATH=\"\$HOME/node_modules/.bin:\$PATH\" >> ~/.profile
 ```
 
 The above change won't take effect until you log out of the current session.
 
 ### Ubuntu 12.04
 
-To install IJavascript in Ubuntu 12.04, both `node.js` and `ipython` need
+To install IJavascript in Ubuntu 12.04, both `Node.js` and `IPython` need
 upgrading to a recent version. You can do so by running:
 
 ```sh
@@ -66,23 +66,39 @@ The instructions for upgrading `node.js` have been adapted from those found
 
 ## OS X
 
-I don't have access to any OS X machine, but I have been told that
+I don't have access to a OS X machine, but I have been told that
 [Homebrew](http://brew.sh/) may help with the installation of the IJavascript
 dependencies in OS X. I would be grateful if OS X users could confirm the
 instructions below work as intended:
 
 ```sh
 ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
-brew install node
-brew install zeromq
+brew install pkg-config node zeromq
 sudo easy_install pip
 sudo pip install --upgrade ipython jinja2 tornado jsonschema pyzmq
 ```
 
 Once the dependencies have been installed, `npm` can be used to install
 IJavascript as described above in the section for Ubuntu and Debian.
 
-## Windows and other platforms
+## Windows
+
+`IPython` could be installed following the instructions at
+[ipython.org/install](http://ipython.org/install.html). I find more convenient
+to install a Python distribution such as `Anaconda`; see
+[here](http://continuum.io/downloads). `Anaconda` not only installs `IPython`
+and its requirements, but also a selection of frequently-used Python packages.
+
+`Node.js` provides a [Windows installer](https://nodejs.org/download/). However,
+the build tool `node-gyp` will not be functional unless one of the recognised
+C++ compilers is installed. See [here](https://github.com/TooTallNate/node-gyp)
+for more details,
+[here](http://www.microsoft.com/en-us/download/details.aspx?id=34673) for Visual
+Studio Express 2012 or
+[here](https://www.visualstudio.com/products/visual-studio-express-vs) for a
+link to Visual Studio Express 2013.
+
+## Other platforms
 
 For other platforms, instructions to install the IJavascript dependencies may be
 found at [nodejs.org/download](http://nodejs.org/download/),