Make FunctionParameterCountRule configurable to support inits

[LipYoung]

dear author:
I use swiftlint in my company's project.This is good library.help me and my colleague more.
but, FunctionParameterCountRule don't detected init constructor func in swift 3 and Xcode 8.
I check source code,it write :

nonTriggeringExamples: [
            "init(a: Int, b: Int, c: Int, d: Int, e: Int, f: Int) {}",
            ... ...
        ],

this is very regrettable.
Want add features.Thinks.

I use English small time.very sorry.Thinks your watch.

[marcelofabri]

This is by design: #544

Although I guess we could make it configurable.

[LipYoung]

Thanks @marcelofabri .Maybe this is right work.

[stale]

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