travis: rake: run spec_use_fs task
base_repository: fix create_cache()

* not cache if caching path exists
git_repository: fix constructor args
repository_manager: check path existence on install
command: support input
social_snippet: load json module
social_snippet: load pathname module
command_line: add SSnip::MainCommand class
command_line: ssnip: spec: add tests for ssnip command
bin: add ssnip command
Merge branch 'wip/ssnip-command/1414462715' into feature/registry-client