adafruit-libraries: new library addon with python libraries from adafruit

[InuSasha]

addon starts with all libraries emanate from the old Raspberry-Pi-Python-Code.
The three libraries from the rpi-tools was migrated to this packages, too.

[chewitt]

Updated icon: http://chewitt.libreelec.tv/icon/icon_adafruit_libs.png

[InuSasha]

@chewitt you want color, you get color :)
icon replaced with your version

[CvH]

@InuSasha could you shuffle the lines (and drop some of them) in addons/libraries/adafruit-libraries/package.mk shown here (to follow the standard package schema which is not yet adopted by all addons - my bad)
also the change in the changelog.txt is missing for rpi-tools (due the rev bump it is "needed")

[InuSasha]

@CvH is there a full description of package.mk format, and is it linked in the CONTRIBUTING.md? (I have not seen it)

edit: upadted

[CvH]

@InuSasha sadly not yet (my bad - I have to do it asap) - btw your changes are fine

[chewitt]

I'll "Ask the audience" for input. Should this be "Adafruit Libraries" or "Adafruit Tools" to match other bundles that we called "tools". RSVP :)

[InuSasha]

I decided to "libraries", because there is no executable in the package. Only python modules.

[MilhouseVH]

I'd keep it as "libraries", since "tools" could imply complete programmes (scripts, executables etc.)

[chewitt]

built and published .. thanks @InuSasha