Proguard: Platform specific quotes
Merge pull request #284 from Shusshu/issue-proguard-platform

Proguard: Platform specific quotes
Attach jar artifact if instructed to (fix for issue 139)
upgrade to maven plugin testing 3.1.0
Fixing issue 441: wrong identifiers in R file in apklib module
Merge pull request #285 from greek1979/master

Attach jar artifact if instructed to (fix for issue 139)
Merge pull request #286 from marchelo/issue-441

Fixing issue 441: wrong identifiers in R file in apklib module