Add book tracker infrastructure for Google
Merge branch 'master' into feature/book-tracker-google

Conflicts:
	app/controllers/book_tracker/statistics_controller.rb
Work on Google checking
Merge branch 'master' into feature/book-tracker-google

Conflicts:
	db/schema.rb
Add Google-checking functionality to book tracker
Add self.table_name to book tracker models
Job perform() methods use begin/rescue blocks; misc. other refactoring
Add service-specific search checkboxes
Add a clear button
Add results count
Remove Book Tracker Statistics view
Merge branch 'master' of github.com:medusa-project/medusa-rails3
Enable filtering by list of bib IDs in book tracker
Book tracker item search form uses POST instead of GET (to support long lists of bib IDs)
Item search form appearance tweaks
Remove an unnecessary cast
Remove no-longer-used book tracker live search JS