Add readme at root of each subsystem

Author: colton-smith

Firmware/README.md

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+# Firmware Directory Structure
+
+This directory will contain all of the firmware for the SAMD21 microcontroller used in the sensor board, as well for any other general MCUs used throughout testing.
+
+*** 
+
+## Common
+``` 
+Includes code that will be common across multiple projects, like sensor drivers and other peripheral drivers
+```
+***
+## Examples
+```
+Will include examples of applications of things like drivers and other pieces of firmware
+```
+***
+### WindTunnel, DTS, Vacuum
+```
+Will include project specific code like the main for each project.
+```
+***

Pidaq/README.md

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+# Raspberry Pi CPU Directory Structure
+
+This directory contains all of the code that will run on the raspberry pi as well as all configuration for grafana and influxdb instances that will run on the pi.
+
+*** 
+
+## DataLogger
+``` 
+Generic name for python application that will log incoming data into influxdb
+```
+***
+## DataShuttle
+```
+Generic name for python application that will recieve and parse incoming CAN messages
+```
+***
+## Examples
+```
+Includes relevant examples for some python modules, influx, and grafana configuration
+```
+***
+## Services
+```
+Includes the configuration and documentation for the grafana server and influxdb
+```

UI/README.md

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+# Graphical User Interface Directory Structure
+
+Contains all the code that implements a module graphical user interface that can be used differently depending on the desired project.
+
+*** 
+
+## Dashboard
+``` 
+Contains documentation and configuration for the grafana dashboard
+```
+***
+## Examples
+```
+Contains examples of grafana dashboard configuration
+```
+***
+## Control
+```
+Contains the web front end for the controls. 
+```
+**Very Temporary** 
+***