clean up orthologize step
display values to webservice function/relationship

updated xsd-generated with display values for FunctionType and
RelationshipType

this change will not be reflected when the webservice model is regenerated

further research is needed to see if the XSD can compile to java Enums with
display values as constructor parameters
improved resolver api through exception handling

A node labe that fails to parse to a BEL term will catch exceptions and
return null, indicating the resolve has failed to find a match

Exceptions are caught in Resolver and rethrown wrapped in ResolverException.
added scripts to start tomcat in foreground