feature started
First two scenarios for no books found.
Steps added.
implemented the steps all to pass
tests made more flexible with regex
Methods extracted from step definitions.
Move stuff into test_driver.rb
test_driver module, 1st
World UIDriver requires library class
tidy
FInished find book implementation
initial rspec setup
first rspec test
Don't need book_count method on bookshelf.
Merge remote branch 'origin/master' into feature/no-such-book

Conflicts:
	features/step_definitions/steps.rb
merge the world!
Merge branch 'master' into feature/no-such-book

Conflicts:
	features/support/test_driver.rb
empty string, whitespace string, and nil tests
add test to search for the only book on the shelf
Searching for a single book amongst many