update README: current instructions for project setup and tests
update README: current instructions for project setup and tests

jastice/intellij-scala,jastice/intellij-scala,triplequote/intellij-scala,jastice/intellij-scala,loskutov/intellij-scala,loskutov/intellij-scala,triplequote/intellij-scala,jastice/intellij-scala,JetBrains/intellij-scala,loskutov/intellij-scala,JetBrains/intellij-scala,triplequote/intellij-scala