fixed several calibrations
first fixes on calibration
added check whether to type of incoming labelings
Merge branch 'master' of https://github.com/knime-ip/knip

Conflicts:
	org.knime.knip.io/src/org/knime/knip/io/ImgRefCell.java
	org.knime.knip.io/src/org/knime/knip/io/ScifioImgSource.java