CHECKPOINT: some code moved around. Need to context switch ...
Merge branch 'master' into NewCrawlTags
Implemented feature, and passing existing tests.
Wrote and passing tests for iframe/embed/object tags.
Merge branch 'master' into NewCrawlTags

Conflicts:
	fetcher.go
	test/fetcher_test.go
Updated some documentation on new functions.
cassandra: moved test config init out of helpers

Stupid mistake earlier: I had put the `init()` function for the
datastore test configuration in helpers.go, which was causing the test
config to load in live use.
parseHtml is more robust to errors: continues parsing on error.
Minor bug: needed to pass true to parseObjectOrEmbed for embed tags.
Merge pull request #61 from iParadigms/init-fail

cassandra: moved test config init out of helpers
Updated the coverage script to use the correct build tags
Merge branch 'master' into NewCrawlTags
Merge pull request #60 from iParadigms/NewCrawlTags

New crawl tags
Merge branch 'master' into LinkInclusionFilter

Conflicts:
	fetcher.go