New Retinanet Model + Rocketbase support

• Remove the SSD Rocket
• Add a new version of Retinanet (Retinanet Resnet101 800px)
• Change Rockethub to Rocketbase for the pip package
• Remove dependencies from the repository

Add Google Vision AI Outputs

Added Google Vision AI outputs in the results for comparison.

Fix Security Issues

Fix the security issue from urllib3.

Better Instructions

An updated version of the tutorial with better instructions and information in the Readme and also clearer code and output in the detect.py file.

Initial Version

Three Rockets to try out and the pip package included for the Rockets landing.