Fix README links to sample projects
Fix README links to sample projects

Resolves #141
blindpirate/gradle,robinverduijn/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle-script-kotlin,blindpirate/gradle,gradle/gradle-script-kotlin,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,robinverduijn/gradle,robinverduijn/gradle,blindpirate/gradle,robinverduijn/gradle