SCResolver, GuardHelper, SCGenerator: don't associate static context data in

the resolver, do it where the static context is being used, i.e., in the
GuardHelper and SCGenerator.

SCGenerator, StaticContextMethod: move invocation of the static context
method into the StaticContextMethod class to make the class pull its weight
a bit.

AbstractParser, SnippetParser: source code cleanups related to annotation
processing.