- enable tar_scm service

- Update to version 0.0.0+git20180909.1003c8b:
* Don't treat initialization to zero like `x := int64(0)` as assignment.
* Guard against invalid code (break/continue outside of loop).
* Definitely don't panic in maybePanic.
* Mark named function results as used in operations that may panic.
* Don't treat explicit initialization to zero as assignment; it is often used as shorthand for a bare declaration.
* Support multiple path arguments on the command line.
* Add a note to the README about limitations.
* Slicing an array or taking the address of an array element causes the array to escape.
* Use control flow analysis to find more useless assignments.
* ignore vendor directories