Removes out of date projects from ground station folder

The ground station code will be written in Javascript with Node. Getting
rid of old out of date code to make way for this.
Overhaul of how we write data from the balloon

We now have a better idea of how data will be sent between the balloon
and the ground station. We use the telemetryKeys json file as a common
schema for our data, hence why it has been moved up to the top level of
the repository. We now write data as a csv string. Every second, we
query the state of our sensors, and build up a data model based on that.
We then convert that model to a csv string using the data keys in the
schema.

Camera data is different from other data, so I no longer try and treat it
in the same way. As well as our other sensors, we now have a separate
camera sensor and data writer, with their own APIs.