Merge pull request #18 from datacleaner/master

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Merge pull request #19 from datacleaner/master

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Change display name of "Trigger" button to "Execute."
commit to have more drop down anchor
refactoring , created separate class for different operation on job
temporary commit to categorise jobs on the basis of source system , added a java scrip callback function.
Refactor and clean up code.
Remove unnecessary text which was accidentally added
Re-arrangement of ui-elements
Remove empty line.
Merge pull request #20 from datacleaner/master

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beautification of ui
Merge branch '3.6.x' of https://github.com/vaibhavsehgal1/DataCleaner into 3.6.x
merge 3.6.x into trunk
Merge pull request #22 from datacleaner/master

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Remove commented-out css code
Move getMetadataProperties to the JobContext interface. Also update jsonMessageConverter to org.springframework.http.converter.json.MappingJackson2HttpMessageConverter to remove an exception.
Added Java 8 build to travis.yml
Fixed unittest (due to changes in AnalyzerBeans)
Fixed abstraction-leak of AnalysisJobMetadata -> Map in JobContext