Write results to an excel file #4

[mariellemanlulu]

Summary of Changes

• Added AmrOutput class to store results file information
  • file name
  • file sheet name
  • file contents
• Added amr_downloader module
  1. grabs all Complete Amr analysis submission available to the specified project
  2. uses analysis submission ids to grab all the result file objects
     • file object is created in irida_api
  3. calls _write_to_excel
     • converts each file contents to dataframe
     • writes dataframe to excel as a separate sheet
• Added logging messages
• Rework irida_api to provide analysis submissions instead of analysis results.

[mariellemanlulu]

Everything looks good, but we need to add xlsxwriter to the requirements.txt file for it to work. Once that's in it will be good to merge.

Done