Code cleanup

See merge request contrera/lstosa!54

* pep8-ing
* use output module instead of bare print

* add MAGICOSA team to CONTRIBUTING.md

Add first draft script for closer

See merge request contrera/lstosa!37

* Change raw print to output function
* PEP8-ing
* Code cleanup

* Remove unused variables
* PEP8-ing
* Code cleanup

Use python bin from `cta` conda environment to allow for python3 synthax

See merge request contrera/lstosa!52

Provenance tracking features in R0->DL1

See merge request contrera/lstosa!50

Add yml file to create an own LSTOSA conda environment

See merge request contrera/lstosa!51

* Add own environment yml file for LSTOSA
* Update README.md with conda env info