Merge pull request #431 from dennishendriksen/master

LifeLines initialization changes + MolgenisUser.Email unique
replace hibernate with eclipselink
add Lob annotation instead of specifying length for large strings
use characteristic.name for display instead of label value
remove hibernate references
replace hibernate with eclipselink
decouple person from molgenisuser, molgenisuser email unique, add characteristics
remove unnecessary xref_label, make ontologyterm a characteristic
remove identifiabledecorator, change RuntimePropertyType
remove index property
remove support for index property
fix model extractor