Using i18n version of input-forms.xml

Input forms definitions are now read from input-forms-[LOCALE].xml file, if
one exists.  Otherwise standard input-forms.xml is used.
Merge branch 'dspace-3_x' of github.com:mateuszneumann/DSpace into ceon-4
Added ability to choose a license from a list
Merge branch 'ceon-6' into dspace-3_x