add encrypted deploy key
update travis settings
+x
add document
add tests for tools
add test for releng
add tool tests. Do the travis containers have `prove`?
try `travis encrypt-file` feature
oops
check commit
Revert "check commit"

This reverts commit bf8040a3fa448822f709cccfef71ae58574dd804.
Merge pull request #46 from mackerelio/feature/auto-tag

Feature/auto tag