Deleted Jenkinsfile due to not working pipeline :-( We have to investigate, how we can setup a working build process for more than one branch. should work, but not today...

jenkinsfile added, builds (or will build) develop and master branch, all versions including "SNAPSHOT" will be deployed to snapshot aptly and nexus repositories, all versions without "SNAPSHOT" will be deployed to release aptly and nexus repositories (as soon I have created the appropriate jenkins pipeline. testing now...

TextGrid Aggregator Release 1.4.9

* switched preview mode to the new site
* support the sandbox in zip export
* fixed zipping search results that contain only filters, no query
* zip: streaming mode is true by default

Cf. #22310

Refs #22310

Refs #22310

Refs #22310

Aggregator 1.4.8 adds support for delivering a table of contents, adds a debian
package to support deployment via our puppet architecture, and supports nested
HTML in the embedded view. It also works around a bug in Java 1.8 that created
TEI headers which were invalid XML.

In Java 8, the built-in XSLTC produces invalid XML (containing a
namespace binding to the prefix `xmlns`, cf. #16730). Saxon however
cannot write to a StAXResult, so we need an adapter to SAXResult.

Fixes #16730.

TODO associated stylesheet is detected as a side effect of fetching the
source. Need to make sure this has been done when we call
getTransformer(). We also need a test here.