Move Functions extension point to org.dawnsci.common.widgets.gda (Cont.)

This commit covers moving KichwaFunction.java to the correct location in
dawn-ui.git
Merge remote-tracking branch 'origin/master'
Changed default fitter to apache_nm
Merge branch 'master' of ssh://dascgitolite@dasc-git.diamond.ac.uk/scisoft/scisoft-core.git
Update to allow the merlin loader to load metadata multiframe files.
Add a test to make sure changing the number of parameters filters up to parent operator