[transformers] tell container that first argument is collection.
Add tests for attachment type
Rename servers to connections
Add stopwatch support for Elastica\Client
Simplify *One methods in the persister
Merge pull request #645 from merk/stopwatch

Add stopwatch support for Elastica\Client
Merge pull request #644 from merk/elastica-connections

Rename servers to connections
Ignore iterator keys when converting to array
Merge branch 'pr/622'
Documentation on aliased repopulation
Fix invalid service reference in production