store: replace go errors with verrors

Though this change is not very small, it is just a couple of
rules applied across the code.

Change-Id: I88e0088bb40e5218e24fbe093b2f726342bc607a
20 files changed
tree: e8b4ac9422f4af09570993716d64ec3231d64ff5
  1. v23/
  2. x/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. VERSION