Remove support for Ruby 1.8.7 and Rails 2.3

[qpowell]

Removing support for old versions as recommended in #270

[andrew]

We still want to require the engine if Rails is defined, but just remove the version check here.

[andrew]

Looking good, I left a couple inline comments of small changes to make and then we can merge it.

Don't worry about that failing spec on travis, it's unrelated to the changes you've made.

🤘

[qpowell]

Awesome, I'll get those things taken care of today

[qpowell]

@andrew Added those last 2 items. Let me know if there's anything else

[coveralls]

Coverage increased (+0.04%) when pulling 8277715 on qpowell:remove-old-version-support into 55068c4 on andrew:master.

[andrew]

@qpowell that looks great, thanks.

One thing you might want to do is make sure your git and github account is correctly set up so the commits are correctly linked to your account: https://help.github.com/articles/why-are-my-commits-linked-to-the-wrong-user/#commits-are-not-linked-to-any-user

[qpowell]

@andrew Thanks. Didn't realize my work email hadn't been linked to my account yet.

[andrew]

@qpowell I've released this as v1.0.0: https://github.com/andrew/split/releases/tag/v1.0.0