Merge tag 'v2.6.1'

2.6.1
Implement where arg on scoped count and destroyAll
Merge branch 'fabien-feature/scope-where'
Make sure error events are emitted by data source
Make sure timeout handle is cleared
Merge pull request #260 from strongloop/feature/fix-ping

Make sure error events are emitted by data source
Bump version
Merge branch 'release/2.7.0' into production