Merge pull request vapor#145 from vapor/pipeline-411

pipeline mysql connection queries

fix core import

rc.2 updates

Merge pull request vapor#110 from vapor/beta

mysql beta

Update errors to capture source

Merge pull request vapor#124 from SandorDobi/beta

Fixing dependecies

Update MySQL to use exact rather than the (broken) revision for depen…

…dency versions

remove engine

Merge pull request vapor#112 from vapor/cci2-macos

Fix and re-enable testing on macOS

Merge pull request vapor#109 from vapor/ci

circle ci 2