v0.1.2

Minor logging/error handling fixes.

Changes:

• update Makefile, add set_exit_status for golint
• fix main_test.go after go-extended version bump-
• add version info to logs
• add regression test for #11
• simplify logging in main.go
• update go-extended dependency to version v0.0.4
• add version info to logs
• add a test case, sort imports