syncbase: various small additions and enhancements

- stop returning error from Table.Scan
- make app/db/table delete idempotent
- implement Table.DeleteRowRange
- add basic perms check to Table.Scan
- various comment and TODO tweaks
- drop WrapError, use verror.Convert

Change-Id: Ib3d34c14751d39c2c7e324945ab30e347cd07e30
24 files changed
tree: b288d3e97938aca49bf030955331e102bd320fc7
  1. services/