Sipann

In this release we introduce a new module that wraps SCEE for simphony integration. It can be found under `SiPANN.scee_simp`. All devices are named the same as in `SiPANN.scee`, but now have units of microns instead to match simphony notation. See documentation for more info.

This update is also available on pypi.

Just a few minor bug fixes. Fixed is:

* Warnings that were generated at incorrect times.
* Various dependencies that actually weren't needed anymore.

First official release of SiPANN! Now installable via `pip install SiPANN`. There were a number of breaking changes in this release in order to make things work properly. Updates and changes include:

* `SiPANN.dc` is now `SiPANN.scee`, and a number of things in this module were also renamed:
* `SiPANN.SiP` is now `SiPANN.nn`
* `SiPANN.dc.RR` is now `SiPANN.scee.HalfRing`
* `SiPANN.dc.Racetrack` is now `SiPANN.scee.HalfRacetrack`
* `SiPANN.dc.DoubleRR` is now `SiPANN.scee.DoubleHalfRing`
* `SiPANN.dc.AngledRR` is now `SiPANN.scee.AngledHalfRing`
* All `DC.sparams()` methods now only return scattering parameters, not frequencies.
* Now compatible with new Tensorflow 2.0
* Newly implemented `ImportLR` class removes dependency on `sklearn`. No more trying to keep up with `sklearn` updates!
* Full documentation now available [here](https://sipann.readthedocs.io/en/latest/#) (tutorials to come)

There's still a few more updates and new features coming, but this is the bulk of them.

First official release. If you've been using `SiPANN.dc`, you've likely been using this release.