[Rtk-users] Release of RTK v2.1.0

[Simon Rit]

Dear RTK users,

RTK v2.1.0 <https://github.com/SimonRit/RTK/archive/v2.1.0.zip> has just 
been
released, about six months after RTK v2.0.1. This release is intended for
inclusion in the ITK v5.1rc01 release. Python packages will be prepared 
after
the release of ITK v5.1rc01.

Release notes:
* Application of ITK's clang-format (Simon Rit).
* Setup of Azure pipelines (Lucas Gandel).
* 2 materials spectral one-step with Cuda (Pierre-Antoine Rodesch).
* New Python wrappings (Pierre-Antoine Rodesch and Antoine Robert).
* Simulation of attenuated line integrals (Simon Rit).
* Spatially varying regularization weights in spectral one step (Simon Rit).
* Add CPU and Cuda memory probes when reporting performances (Simon Rit).
* Streaming of projections in spectral one step (Simon Rit).
* New installation instructions (Simon Rit).
* Various bugs and style fixes.

Many thanks to all contributors, in alphabetical order for this release:
Gordian Kabelitz, Antoine Robert, Lucas Gandel, Simon Rit and Pierre-Antoine
Rodesch.

As usual, be aware that we don't focus on releases since we have a public
github repository <http://github.com/SimonRit/RTK> that we try to keep 
stable.
I still recommend the use of the master HEAD over releases to enjoy the 
new RTK
developments before their release. We still have a few on-going projects for
which we will use and enhance RTK.