custom comparator for Collection.forNext()
multiple type arguments turned into single type in Path and Tree
dictionary test for joining by keys (reverse x combineWith)
convenience built-in extensions for instantiation
strict mode
class shortcuts removed from tests
strict validation annotation
troop version upped to 0.3.3 b/c of strict mode
missing line breaks at end of files
optional exclusion in OrderedStringList.getRangeByPrefix()