Screenpro2

minor improvements
- public release on Arc's website https://arcinstitute.org/tools/screenpro2
- improve the conda environment and docker config files
- improve documentation
- split `phenoScore` and `phenoStats` modules

Features:
- Pipelines to perform screen processing analysis on `ScreenPro2` object
- Drug screen workflow
- Flow cytometry based screen workflow
- Support one CRISPR screen platforms
- CRISPRi-dual-sgRNA-screens

This is a tool under development and tutorials will be introduced in the next releases. In the meantime, feel free to email abearab for any question: abeaarcinstitute.org