Don't hard-code the Rails gem version into the tests.
Move the cursors_3.rb file to cursors.rb.
Consolidate some shared code.
Silence some deprecation warnings.

We'll have to worry about this when Rails 4.1 comes out.
Force unprepared SQL statements so we can wrap them in a cursor.
Silence deprecation warning.
Run all tests whenever we modify a file.
Bump to 0.1.0.