Clean release notes and welcome message for 6.7
Clean release notes and welcome message for 6.7

blindpirate/gradle,blindpirate/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,gradle/gradle,gradle/gradle