capistrano v3.1 compatible improve: dependency solve

- solve dependency problem from capistrano/capistrano@a58bb3bca2b
Merge pull request #22 from crhan/depends_fix

capistrano v3.1 compatible improve: dependency solve
bump version for support capistrano v3.1
Merge pull request #24 from crhan/v0.1.3-bump

bump version for support capistrano v3.1
Capistrano 3.1 support