proper error reporter, advanced version
build editorconfig
license info for editorconfig core
Fix possible NPE during expression extraction refactoring

It may occur in cases of variable extraction like "(21 + <start>21) and 'spam'<end>".
Correctly extract text fragment from parental PSI element for SELECTION_BREAKS_AST_NODE
don't hold session name
simplify API — ExecutionEnvironment is enough
Gradle: SMTestProxy.addChild should be called in EDT;
see http://crucible.labs.intellij.net/cru/CR-IC-6032 for details