m14 operator fun syntax
m14 operator fun syntax

This edit brings the `get` function in line with Kotlin M14's expectation that it use the `operator` modifier (see "Operators" [here](http://blog.jetbrains.com/kotlin/2015/10/kotlin-m14-is-out/). This change resolves a Kotlin M14 compiler warning.
JakeWharton/kotterknife,MaTriXy/kotterknife,JakeWharton/kotterknife,MaTriXy/kotterknife