fixed bug & reduced number of displayed images
further improved color distances
res
Merge branch 'master' of https://github.com/RensHoegen/ir-project.git

Conflicts:
	ir-project/src/main/java/ir_project/invoker/ListDistancesInvoker.java
	ir-project/src/main/java/ir_project/io/ImageSummaryExtractor.java
adding initial clustering
Merge branch 'master' of https://github.com/RensHoegen/ir-project.git

Conflicts:
	ir-project/src/main/java/ir_project/model/ImageSummary.java
fixed divide by zero error (requires reference cache file to be cleared)
Merge branch 'master' of https://github.com/RensHoegen/ir-project.git

Conflicts:
	ir-project/src/main/java/ir_project/gui/GuiInvoker.java
Merge branch 'master' of https://github.com/RensHoegen/ir-project.git