reintroduced Pipeline

kieker)

updated dependency to kieker 1.11-SNAPSHOT

#40 Kieker version of this stage removed, as it is not needed

Maven repo

At least the snapshot deployment works.
When we are ready to release 1.0, we need to test if this also works, as a release needs to comply with stricter rules.
To see the changed needed on settings.xml, look at #52

See merge request !9

Interthread signal

solved issue #45

See merge request !8

Release needs further tests

Changed type of pipe to InterThreadPipe to get method getSignal

Conflicts:
	pom.xml

helpful in the future
added test, to validate signalhandling in interthread pipes