Merge pull request #161 from logiclord/master

 Pig jobs are failing due to pig.additional.jars #160
Merge pull request #163 from logiclord/master

HDFS viewer fails to render empty files
Automatically inject Azkaban properties beginning with hadoop-conf into the Hadoop configuration for HadoopJava, Pig, Hive and Java job types
Updates based on pull request feedback to inject Azkaban properties into the Hadoop conf automatically
Change the prefix name of Hadoop conf properties to auto-inject
Make auto-inject prefix text a public static final String
Consolidate injecting Azkaban links and injecting Hadoop conf properties into one single code path for the HadoopConfigurationInjector, based on Hien's pull request feedback
Fix typo in HadoopConfigurationInjector javadoc
Merge pull request #164 from convexquad/master

Automatically inject Azkaban properties beginning with hadoop-conf into ...
New metadata property for all the jobs #377