1.3

Add sbt-scalafmt-coursier, for fetching via coursier

1.2: Make scalafmt-api a provided dependency of scalafmt-impl

Not necessary as a compile dependency

1.1: Use 0.7 scalafmt-impl for 1.0

They have the same binary interface.
Fixes https://github.com/lucidsoftware/neo-sbt-scalafmt/issues/12

1.0: Fix Travis CI badge

Bad copy-pasta

0.4

Hide scalafmt configuration

0.3

Add scalafmt::externalDependencyClasspath for debugging

0.2

Add scalafmt::sources task

0.1: Make scalafmtOnCompile a TaskKey

Allows for more flexibility

0.0

Add scalafmtTest