Add a shared evaluator for libraries, classes and instances. Add an as-yet-unused instance view.
Address some review comments regarding dead code / refactoring.
Merge branch 'master' of github.com:johnmccutchan/observatory into evaluator

Conflicts:
	app/src/main/java/org/dartlang/observatory/LibraryView.java
Must not extract sub serviceobject before upgrading.
Merge branch 'master' of github.com:johnmccutchan/observatory into evaluator
Merge pull request #2 from johnmccutchan/evaluator

Add a shared evaluator for libraries, classes and instances. Add an as-y...