Gradle init scripts

A couple of useful / handy / demo scripts for inclusion in ~/.gradle/init.d

announce.gradle

• Adds build-announcements plugin by default

idea.gradle

• Adds plugin: idea to all projects

initSourceDirs.gradle

• Adds task initSourceDirs which creates src/{main,test}/{language} for each of the languages activated

showRepos.gradle

• Adds task which prints out name of all repositories configured for project

wrapper.gradle

• Adds a default wrapper task which creates the gradle wrapper