Create rule+tests to lint/format annotations for members/types

[cable729]

Fixes #258

For reviewers to double-check:

• Are there any tests I'm missing? I feel like there are probably some more obtuse/strange ways annotations can be placed

[shyiko]

Thank you for the PR, Caleb! It looks really, really good. The only other thing I would check would be how it behaves when annotations have arguments spread over multiple lines, e.g.

@JvmField @Volatile @Annotation(
    enabled = true,
    groups = [
        "a",
        "b",
        "c"
    ]
)

[shyiko]

Thank you!