Pyuvis

New Features

- Adding axis attributes ([8](https://github.com/Cassini-UVIS/pyuvis/issues/8))
- An undocumented feature of hvplot enables determination of the plotting axis
via attribute setting.

New Features

- Implement EUV ([3](https://github.com/Cassini-UVIS/pyuvis/issues/3))
- Implemented new general UVPDS class for all single product_id reading

Bug fixes
- integrations and n_integrations confusion ([2](https://github.com/Cassini-UVIS/pyuvis/issues/2))
- Obsolete due to new classes (see above)