Merge pull request #16 from datacleaner/master

Get latest from Datacleaner.
Merge pull request #17 from datacleaner/master

Get latest from Datacleaner.
Write message to HTTP response if an attempt is made to rename a job to an existing job name. Also show this message on the UI.
Merge pull request #91 from vaibhavsehgal1/master

Write message to HTTP response if an attempt is made to rename a job to an existing job name. Also show this message on the UI.