Update the acceptance harness some.
Added tag go1 for changeset f7dcdc414bd0
Refactor: Use exp/html for the html parser. Api changes along the way as well.

* First get rid of the temporary h5 parser and create a set of wrappers to
  make dealing with html.Node trees.
* Add some helper functions for constructing common Nodes.
* Fix all the tests.
* Add a Trace TransformFunc to help with debugging.
* Get rid of the rather missbegotten ForEach function.
Revamped CSS3 Selector Package

* Full CSS3 Selector chain parsing.
* Better representation in data of the selectors.
* Constructors for Selectors.
* Specificity calculators for a SimpleSelector/Chain.
* Matching against an exp/html Node tree will come later.
Test update for parsing.
Add Find method for Selectors.

* Find searches an html.Node tree for nodes that match the Selector Chain.
* Fixed an error in parseSequence where they all started with an
  empty selector.
Clean Up:

* remove debug log statements that were commented out.
* go fmt for the selector package.
Add a subset of the PseudoClass selectors.

* Fix a bug in the parsing of pseudoclasses.
* Add matching logic for {first,last,only}-child and empty.
* Add tests for the finder logic for each of the added pseudoclasses.
Use the new selector package in the transformation library.

* Define an interface Collector with the Find method on it.
* Deprecate
** Apply
** SubTransform
** Trans
* Add generic Versions that take a Collector
* Add specific methods that use the selector library.
* Call the generic methods from the deprecated versions.

While we are in here we change the api's to be saner and easier to use.
This change is a backwards incompatible api change.
Clean up the api to show selector parsing errors.

This is again a backwards incompatible api change.

* Apply returns an error on parse failures.
* SubTransform returns an error on parse failures.
* Trans returns an error on parse failures.
go fmt and fix some vet errors
Add Must* versions of functions that can return errors.

* Subtransform
* Trans

Also remove the ugly T in SubTransform for consistency since we've already
broken backwards compatibility.
Update some docs and Expose the Link's Combinator field.
Use the new go.net location for the html parser.
Add Render method for the html transform documents.
go fmt
Clean up the constructor API for transform and h5 class.

* Creating Transforms and/or Tree html wrappers are one function call now
* Clean up the docs for those methods as well.
* Get rid of the unnecessary helper functions.
* We no longer have a parser type since that is delegated to go.net/html now.
* Fix missing capitalization in the css/selector package.
Bugfix: in NewFromReader error handling

NewFromReader improperly compared err to nil.
go fmt.
Merging.