version increment

See merge request !81

Pmd fixes

major overhaul with tons of PMD fixes

See merge request !80

Runtime pipe check

check is executed upon onStarting... it just takes a look at the type of the output port and compares it to the input port
A Test for a false connection can't be done without a DSL or such, as the generics prohibit a false connection in the IDE.

See merge request !78

Conflicts:
	src/test/java/teetime/framework/AbstractStageTest.java
	src/test/java/teetime/stage/basic/merger/MergerSignalTest.java

Fixes #260

As the merger does not have any separated logic anymore, the tests can
be moved to AStageTest

See merge request !79