building.md: Update building docs

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

docs/building.md

@@ -11,13 +11,14 @@ what you'll need:
 * [SWIG](http://swig.org) 3.0.5+
 * [git](http://git-scm.com)
 * [python](http://python.org) 2.7 or 3.4+ (you'll need not just the interpreter but python-dev)
-* [node.js](http://nodejs.org) 0.10.x or 0.12.x (you'll need not just the interpreter but nodejs-dev)
+* [node.js](http://nodejs.org) 4.x recommended (you'll need not just the interpreter but nodejs-dev)
 * [CMake](http://cmake.org) 2.8.8+ (3.1+ is recommended for node.js version 2+)
+* [json-c](https://github.com/json-c/json-c) 0.12+ (0.10+ probably works in reality)
 
 For Debian-like distros the below command installs the basic set:
 
 ```bash
-sudo apt-get install git build-essential swig3.0 python-dev nodejs-dev cmake
+sudo apt-get install git build-essential swig3.0 python-dev nodejs-dev cmake libjson-c-dev
 ```
 
 To build the documentation you'll also need:
@@ -52,8 +53,9 @@ Currently our install logic puts Python bindings into standard paths, which
 do not work on Debian due to their
  [policy](http://www.debian.org/doc/packaging-manuals/python-policy/ch-python.html#s-paths).
 
-We are working on a permanent solution, in the meanwhile please use this command
+We are working on a permanent solution, in the meantime please use this command
-after `make install` to link installed modules where Debian's Python expects them:
+after `make install` to link installed modules where Debian's Python expects
+them:
 
 ```bash
 sudo ln -s <your install prefix, e.g. /usr>/lib/python2.7/site-packages/* /usr/lib/python2.7/dist-packages
@@ -91,6 +93,10 @@ Disabling Python module building:
 Building doc, this will require [SPHINX](http://sphinx-doc.org) &
 [Doxygen](http://doxygen.org):
  `-DBUILDDOC=ON`
+You will also require clone git submodules from your existing checkout:
+ `git submodule update --init --recursive`
+The from doxygen2jsdoc dir:
+ `npm install mkdirp commander lodash bluebird pegjs`
 
 Override build architecture (this is useful because on x86 ARM code is not
 compiled so use this flag to force the target arch)
@@ -102,19 +108,13 @@ You'll need at least SWIG version 3.0.2 and we recommend 3.0.5 to build the
 JavaScript & Python modules. If your version of SWIG is older than this then
 please see above for disabling `SWIGNODE`. Otherwise you will get a weird build
 failure when building the JavaScript module. The Python module builds with SWIG
-2.x.
+2.x but we don't test it.
 
 During the build, we'll assume you're building from git, note that if you
-compile with `git` installed your version of mraa will be tagged `-dirty`. This
+compile with `git` installed your version of mraa will be versioned with `git
-simply means `git` wasn't installed or that you where building from a tarball.
+desribe --tag` to make it easy for intentification. You can easily modify
-You can modify `build/src/version.c` before running `make` if this is incorrect.
+version.c in build/src. If you don't build from a git tree then you will simply
-The instructions listed here all assume that `build/` is an empty dir that lives
+have a version which matches the latest released version of mraa.
-inside the cloned repository of mraa.
-
-If you have multiple versions of Python then mraa can get confused, we
-recommend using virtualenv to select which version of Python you want. We test
-2.7 the most but SWIG will generate valid 3.x Python code but we do not
-generally support building both at once.
 
 ## Using a Yocto/OE toolchain
 
@@ -131,7 +131,6 @@ make
 
 ## Using Coverity
 
-Static analysis is routinely performed using Coverity on libmraa's codebase.
 This is the procedure to submit a build to Coverity. You'll need to install
 `coverity-submit` for your OS.