* Rename web to wherehows-api and update README.
* Rename backend-service to wherehows-backend
* Rename metadata-etl to wherehows-etl
* Rename hadoop-dataset-extractor-standalone to wherehows-hadoop
Benefits
1. Simpler setup - no need to download activator in order to build & run
2. Faster build - See https://engineering.linkedin.com/play/developing-play-applications-using-gradle
3. Streamlined dependency management - Everything defined in build.gradle, instead of build.gradle + build.sbt
4. Better integration with gradle lifecycle tasks - build, test, dist, clean all work as expected
Changes
1. Location of staging & distribution files moved from target to build
2. Use ./gradle -t runPlayBinary to run app with hot reload support
3. The generated start scripts are quite different from those generated by sbt
