WIP
WIP Slice Looper
WIP: Slice Looper Start
Slice looper Node
Slice looper Node
WIP End Node
WIP
slice loop start/end node
xml documentation of slice loop start/end node
added column selection
modified loop start node xml documentation
added javadoc
changed name to slice iterator and collect slices
removed chunk size option from slice iterator
added type filter in column selection
added simple icons
Merge branch 'plane-looper' into 1.2.0

Conflicts:
	org.knime.knip.core/.classpath