tweaks
added coverage for metadata
merged master
Merge pull request #109 from mozilla-services/stats-tweaks

tweaks
do not run dns_resolve before request for https:// urls
Merge pull request #112 from diyan/master

do not run dns_resolve before request for https:// urls
fixed flake
Merge pull request #110 from mozilla-services/external-runners-refactoring

External runners refactoring
Add support for multiple runs in external runners.

This allows to have more than one set of runs.
Fix some behaviour in the external runner.
add tests for the external runner