Revert "require spec_helper in shared examples"

This reverts commit 8ab0db5601f75465b712bdaf7c022cc0c8c935e0.
Deprecate share_examples_for in favor of shared_examples_for
Request rspec version 3 in gemspec
Refresh cassettes
be true / be false
Amend integration specification to match new cassette
Using `stub` from rspec-mocks' old `:should` syntax without explicitly enabling the syntax is deprecated. Use the new `:expect` syntax
RSpec::Core::Configuration#treat_symbols_as_metadata_keys_with_true_values= is deprecated, it is now set to true as default and setting it to false has no effect.
Merge pull request #2 from karlentwistle/rspec_3

Rspec 3