Document voice recognition module

[dyamon]

Voice recognition is a feature that has been extensively explored and as a result we produced a set of modules that should be usable in combination with the arm. At the moment these resources are not documented.

We need to extend the wiki to contain at least the following:

• [x] A list of features provided by the modules
• [x] A list of technologies (software and resources) used
• [ ] Instructions on how to setup and install the modules
• [ ] Description of the interface that will be use to communicate with other modules (and the arm)
• [ ] Roadmap including any missing piece

Decisions should be justified and mistakes made in the process should be documented.