Lofar-h5plot

**Updates**
* Rearranged project to upload to PyPi

Release to get a Zenodo DOI.

**Bugfixes**

* Use a refrence antenna when plotting TEC solutions.

**Bugfixes**
* TEC soltabs for real now.

**Updates**
* Support for multiple directions inside an H5Parm.
* Phases are always wrapped, so checkbox removed.

**Bugfixes**
* TEC soltabs better supported.

**Updates**
* Singularity recipe and container now available.

**Bugfixes**
* RMextract plotting was broken.

**General notes**