Automatic deployment to update site

[skalarproduktraum]

@kephale has a very nice script for SciView, that automatically deploys the latest build to a Fiji update site, if it succeeded: https://github.com/scenerygraphics/SciView/blob/master/sciview_deploy.sh

We should add something like that!

[hadim]

Please have a look at this script: https://github.com/hadim/FilamentDetector/blob/master/.travis/upload-update-site.sh

It's very easy to use since you only need to set up 3 variables in the Travis configuration page (it requires your repo to run the travisify.sh script first).

[hadim]

See this for a more "long-term" script: fiji/fiji#177