improving README.md

A number of new recipes

libfreenect: updating to 0.2.1 (resolves #248)

Updating to 0.2.1, and correcting shipping of fakenect libraries.

In the commit 21f7799e, I manually
modified the patch, but it slipped my eyes to adjust the line
information in the patch accordingly.
This commit corrects the line information, so that the patch can
now be applied correctly.

adding Upstream-Status to patches in recipes-ros

This commit further adds a simple fix to the patch for the ros-comm
repository.

licenses: adding wxWindows license (resolves #247)

pocketsphinx - initial commit

speech-tools, festival, audio-common-msgs and sound-play: initial commit

timer-tests: initial commit

Following updates in the ROS Hydro distribution

The patch for diagnostics has been merged in version 1.8.2, and
hence is removed.