DDF-886  added support for PropertyIsEqualTo/LessThan/LessThanEqualTo for float/double/int/short/long values
DDF-887 added in logic to prevent NPE if Metacard.METADATA attribute is null.  If it is null a SchematronValidationException will be returned now.
DDF-886  fixed PropertyIsLessThan and PropertyIsEqualTo implementations
Merge pull request #37 from jvettraino/master

DDF-887 added in logic to prevent NPE if Metacard.METADATA attribute is ...
DDF-893  reversed logic on setting the metacard content type based on the <category> element