Show capistrano output as it was in 0.4.x

The silent output was introduced in
https://github.com/sprinkle-tool/sprinkle/commit/a6e7356318c41a6a67307932182ec8e51bce8b70#L0L91
Merge pull request #108 from ebeigarts/capistrano-output

Show capistrano output as it was in 0.4.x