Fixes scalatra/scalatra#419
Merge pull request #420 from nilskp/2.3.x_2.10

Fixes scalatra/scalatra#419
Bump dependencies
Reduce deprecation warnings
Fix issue where Scalatra Test prevents client from sending multiple headers of the same name
Merge pull request #449 from shintasmith/fix_multi_header

Fix Scalatra Test so client can send multiple headers of the same name
Merge pull request #447 from seratch/minor-upgrades

Minor upgrades and deprecation warnings reduction
Add scalariform build settings
Apply scalariform