Cosmic-conn

- fix broken preivew images from online service

------------------

- added pencil tool for pixel-level manual editing on the CR/segmentation mask
- update zenodo archive

------------------

- added scripts to reproduce ablation study experiments
- zenodo archive

------------------

- added `-c` option to CLI to specify crop size for stamp detection
- stop using memory_check(), which is not robust on server nodes
- moved messages to logger, stdout turned on only for CLI users
- removed trained models' DataParallel wrapper
- new threshold-based plots for BANZAI integration

------------------

- Trained models added to git repository

------------------

- Added pip optional dependencies install support.
- pip install cosmic-conn basic install for CR detection
- pip install cosmic-conn[webapp] include Flask for the web app
- pip install cosmic-conn[develop] all dependencies for development

------------------