Clean up some errors when using the typescript dev mode watcher (that detects changes in typescript files and automatically complies it to javascript and reloads the page). The 'grunt serve' task now compiles all the typescript properly (and 'grunt build' compiles for webapp builds).
Merge pull request #85 from rhq-project/typescript-dev-watcher

Fix typescript dev mode watcher grunt task
update required Cassandra version
Remove trailing whitespace in root README file
Check PIPESTATUS to get Maven build result, otherwise mvn exit code is lost
Require JDK 8 for building
Removed Java 7 API check
Update maven-compiler-plugin config