Election for Tamas Cservenak as Committer on Eclipse Sisu

Tamás has been a long-time consumer of Sisu from its use in Nexus and Maven, and has provided valuable feedback via issues and documentation improvements.

Since the project's move to GitHub they have also addressed the following bugs:
- Fix CDI related issues (https://github.com/eclipse/sisu.inject/pull/1 and https://github.com/eclipse/sisu.plexus/pull/1)
- Improved debug logging (https://github.com/eclipse/sisu.mojos/pull/1)

Tamás also has pull requests open to improve the build, such as https://github.com/eclipse/sisu.inject/pull/61 as well as suggestions to improve usability like https://github.com/eclipse/sisu.inject/issues/58

Currently we only have one active committer on Sisu (myself) and I would like to avoid being a bottleneck to the valuable work that Tamás is contributing.

It is therefore my pleasure to nominate Tamás as a committer on Sisu.