Remove "with-sbt-classifiers" for sbt-idea for 0.10 and fix command for sbt-idea for 0.7.
Remove "with-sbt-classifiers" for sbt-idea for 0.10 and fix command for sbt-idea for 0.7.

"with-sbt-classifiers" doesn't work with SBT 0.10 and I intend to make it the default
once SBT 0.10.1 is out.

orfjackal/idea-sbt-plugin,retronym/idea-sbt-plugin,retronym/idea-sbt-plugin