Conversions: Upgrading Convert::Pluggable to 0.021 and adding regression tests
HTTPS -> HTTP for hidden service url

It's not a necessary change--but it's currently redundant given that all tor traffic is encrypted. Maybe even keep if people are more comfortable seeing the HTTPS

// @nilnilnil
Merge pull request #462 from duckduckgo/mintsoft/convert-fixes

Conversions: Fixing Temperature Calculations
Merge pull request #465 from duckduckgo/zac/fixHiddenServiceAddress

HTTPS -> HTTP for hidden service url
Merge branch 'master' into mintsoft/blood