Simplify samples/README instructions
Simplify samples/README instructions

Reflect that:

 - generateKtsConfig is no longer necessary
 - patchIdeaConfig is no longer necessary

And link to latest build of Kotlin IDEA plugin

gradle/gradle,gradle/gradle-script-kotlin,robinverduijn/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,robinverduijn/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,blindpirate/gradle,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle-script-kotlin,blindpirate/gradle,blindpirate/gradle,robinverduijn/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle