Changed the FormHelper setEntityManagerFactory to a static so it could
be set during application startup.
Fixed a pre-conditions which was validating against the wrong field.
Changed usage of setEntityManager to static.

More work needs to be done here.
Merge branch 'master' of https://github.com/rlsutton1/VaadinUtils

Conflicts:
	src/main/java/au/com/vaadinutils/crud/FormHelper.java
	src/main/java/au/com/vaadinutils/crud/MultiColumnFormLayout.java
builds a list of entity column attributes which can be passed around.
made entitytable public
new ctor which doesn't require the generator.
moved to static FormHelp.setEntityFactory