0.1.5

Features

• workaround timeouts w/ larger db conn sizes (3ea16124, closes #302)
• use actix_web header parsers (a021171e, closes #294)
• add spanner tools (21fbdb46)
• add tag support for metrics. (cb8cff5a, closes #222)

Bug Fixes

• send logging output to MozLog (b83429ee, closes #285)