complete mess, first try with swingworker
looks good but is buggy ::(
Merge branch 'master' into multi-threaded

Conflicts:
	org.knime.knip.imagej3d.base/src/org/knime/knip/imagej3d/ImageJ3DTableCellView.java
remove unnecessary ;
fixed timeline ui visibility trigger
added caching
added full reload method that flushes cache
removed fit view  from menu