Resolve "Add charge as weights for histogram"

Closes #11

See merge request !7

also added shameful cov badge

- Added codacy badge
- Added docker
- Added singularity file.

- orcasong is now called legacy
- orcasong_2 is now called orcasong

Other changes:
- Added one line 2017 bin edges to repo
- added unittests
- added versioning for files created with orcasong
- Expanded doc
- Added check to calib if calib has been done to file already

Fix dependency conflict for issue

- Added option for calibration with detx file
- added bin stats plot to setup
- better doc

- Removed event skipper from concatenate_h5_files (use shuffle instead)
- Fix for shuffle_h5, and it also copies used_files datagroup if present to shuffled file
- Added authorship to orcasong_plag