Patch apparently complete, and existing tests are ok.
Merge branch 'master' into LinkInclusionFilter

Conflicts:
	fetcher.go
Tests written and passing with this patch.
Removed some debug logging.
Merge branch 'master' into LinkInclusionFilter
Remove the unused method rejectLink.
Reformated code in shouldStoreParsedLink to be more readable.
Reformatted some code by removing a space-occupying comment.

Looked better in my editor with the comment, but whatever.
Merge branch 'master' into LinkInclusionFilter

Conflicts:
	walker.yaml
Merge pull request #65 from iParadigms/LinkInclusionFilter

Link inclusion filter