Suggest using Scala class in ScalaTemplates.md
Update Modules.md

Add Silhouette module
Merge pull request #2419 from akkie/patch-1

Update Modules.md
Add default to ScalaForms.md
Merge pull request #2442 from wsargent/fix-2319

Add information about default values to ScalaForms.md
Merge from master to 2.2.x for Scala JSON doc rewrite (issue 2395)