pull over runspecs improvements from schema_plus
add rails 4.1
add STI subclass test
Convert specs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.3.4 with the following command:
    transpec spec

* 91 conversions
    from: obj.should
      to: expect(obj).to

* 80 conversions
    from: == expected
      to: eq(expected)

* 29 conversions
    from: obj.should_not
      to: expect(obj).not_to

For more details: https://github.com/yujinakayama/transpec#supported-conversions
use Gemfile.base mechanism
deprecation fix: use simplecov-gem-profile instead of -adapter
deprecation fix, establish_connection with symbol instead of string
rails 4.1 introduced another (internal) path that’s used for reflecting, which we need to trap
test on ruby 2.1.2
add rails 4.1 to the tests
version bump 1.2.1