Add Jenkins for local CI

[hohwille]

Add jenkins to the software package also include a ready to use configuration template for a CI build job on main repo.

[hohwille]

I add a folder jenkins to software folder. Inside I put jenkins.war and also bin/jenkins.bat with:

cd %~dp0
cd ..
java -DJENKINS_HOME=%CD%....\conf.jenkins -jar jenkins.war --httpPort=9090

Already works...

[hohwille]

I will still postpone this to the next release. I mean it is easy to include a jenkins but it is only wasting disk space until it is properly preconfigured and works reliable with our git workflow. This needs more testing. For those who bleed to have it get in contact with me and get the current state to include manually.