fixed versions
Merge branch 'master' of https://github.com/knime-ip/knip-imagej2
Correctly setting plugins.dir for IJ1 now

	* Setting correct plugins.dir for external plugins (headless
	* Additionally added CLAHE
Added CLAHE Macro
Setting IJ1 plugins dir to arbitrary location

	* plugins dir can (programtically since now) bet set to arbitray plugins location.
	* TODO: Make it selectable for user
Made IJ1 Plugin folder configurable!

	* TODO: make it configurable for user in preference page
Merge branch 'master' into img2ij