Add some more examples

[nick125]

Maybe even come up with a set of default patterns?

[pyromaniac]

Rails examples were really helpful, you have to mention them in the readme at least. Awesome plugin, thanks!

[alecthomas]

Here's some configuration for Go and tests:

'^(.*[/\\\\])?(.+)(\\.go)$': [
    '**/$2_test.go',
]

'^(.*[/\\\\])?(.+)_test(\\.go)$': [
    '**/$2.go',
]