Set output file extension based on dataset type
- GalaxyWorkflowEngine: set output file extension based on dataset type.
- updated the RNA-Seq DGE Galaxy workflow file in the data directory.
- RnaSeqDgeExample: use input files from the resources directory.
- RnaSeqDgeExampleTest: started working on unit tests.
- HistogramExample: set debugging to true, retrieve the API key from the properties file, set the download directory to tmp, and no longer remove the output file.