Add some documentation

README.md

+# MangOH
+
+Base project containing apps playing with MangOH hardware
+
+## Setup
+
+### Linux
+
+Open a terminal and load Legato development environment
+* `source ~/legato/packages/legato.sdk.latest/resources/configlegatoenv`
+
+### Windows
+
+Launch the **Legato Command Line** shortcut to load the Legato development environment
+
+### Get the source code
+
+Clone this repository and initialize the sub-modules
+* `git clone git://github.com/swiDeveloperStudio/mangOH`
+* `cd mangOH`
+* `./setup.sh`
+
+### Build
+
+Build the MangOH Legato system
+* `make all`