#45 refactor internal syns

[Mark Gibson]

internal synonyms need refactoring both in game and
apollo. currently external syns are in game as
<synonym>xyz</synonym> and internal syns are actually
game properties - extremeley awkward
<property>
<type>internal_synonym</type>
<value>CG:AE003603.Sept:temp1x</value>
</property>

need to just have <synonym
internal="true">CG:kooshkoosh</synonym>
and in apollo/java internal is recorded as a property
(and its not at first obvious at all) - need to add
internal boolean to Synonym object