Use ofxAddonTemplate

[roymacdonald]

Hi, this looks really nice although it does not comply with the ofxAddonTemplate, which makes this a bit problematic for adding to other projects using the project generator.
Please can you make it comply with it?
(it is really easy actually. it just means to leave this project you have as the example and move to the addons src folder the code for your addon, and fill out the addon_config.mk file.)