Tests refactor

[davidfischer]

This breaks the toml files used for tests into separate files. This way other projects might be able to use those files without having to extract them from the Python tests. I had created these tests for my own pytoml implementation based on pyparsing. However, when I saw yours, I figured I'd just integrate my tests into your project.

These tests uncovered what I believe to be a couple bugs:

• Keys can start with or consist entirely of numbers (see #65). This hasn't entirely been decided but it will be good to have tests either way.
• Single quoted strings cannot contain escaped single quotes and the same for double quotes.

[davidfischer]

Somehow I missed in my reading of the spec that there are no single quoted strings. However, double quoted strings cannot contain escaped double quotes.

[davidfischer]

The double quoted strings issue is fixed in 0b33768 after #4.

[bryant]

I placed your changes in branch and went ahead to refactor some more. It's here. Let me what you think before I merge it into master.

[davidfischer]

I love the refactor! I figured we could do something like this but I was worried it would collapse the tests into one single large test. This code is quite elegant. Who doesn't love a good eval?

The only issue I see is the comment I made about using dirname with abspath. I believe Windows (although I can't readily verify it) has issues with dirname without abspath.

[davidfischer]

If eval is a concern, we could use a datetime aware JSON parser.

[bryant]

Merging.