Merge branch 'core'
Revert "Regenerated EditorService-pretty.pp"

This reverts commit 7f2c66afbf92ec1702cfb8e9d9d17d1d60f2741a.
Updated EditorService-pretty.pp with 'text reconstruction' esv rule
pp improvement
Improved layout (removed some empty lines) in YourLang-Refactoring.esv
Added VFS adapter for Eclipse's resource system.
Added test project for the Spoofax Eclipse runtime.
Merge branch 'master' into core