DroneAid: A Symbol Language and ML model for indicating needs to drones, planes

From the README https://github.com/Code-and-Response/DroneAid :

> The DroneAid Symbol Language provides a way for those affected by natural disasters to express their needs and make them visible to drones, planes, and satellites when traditional communications are not available.

> Victims can use a pre-packaged symbol kit that has been manufactured and distributed to them, or recreate the symbols manually with whatever materials they have available.

> These symbols include those below, which represent a subset of the icons provided by The United Nations Office for the Coordination of Humanitarian Affairs (OCHA). These can be complemented with numbers to quantify need, such as the number or people who need water.

Each of the symbols are drawn within a triangle pointing up:

- Immediate Help Needed (orange; downward triangle \n SOS),

- Shelter Needed (cyan; like a guy standing in a tall pentagon without a floor),

- OK: No Help Needed (green; upward triangle \n OK),

- First Aid Kit Needed (yellow; briefcase with a first aid cross),

- Water Needed (blue; rain droplet), Area with Children in Need (lilac; baby looking thing with a diaper on),

- Food Needed (red; pan with wheat drawn above it),

- Area with Elderly in Need (purple; person with a cane)

So, we're going to need some artists; something to write large things with; some orange, cyan, green, yellow, blue, lilac, red, and purple things; some people who can tell me the difference between lilac (light purple: babies) and purple (darker purple: old people); and some drones that can capture location and imagery.

Note that DroneAid is also a project of The Linux Foundation Code and Response organization.