Merge branch 'master' into hadoop-index-task

Conflicts:
	common/src/main/java/com/metamx/druid/utils/JodaUtils.java
	indexer/src/main/java/com/metamx/druid/indexer/DbUpdaterJob.java
	indexer/src/main/java/com/metamx/druid/indexer/HadoopDruidIndexerConfig.java
	indexer/src/main/java/com/metamx/druid/indexer/IndexGeneratorJob.java