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

- changed data_to_images in order to use the KM3Pipe Pipeline concept instead of iterating over the HDF5Pump.
- Added output dirpath, chunksize, compression filter and compression strength arguments
- Added CI versioning and publishing of OrcaSong via Pypi