Added rake task to download link and store it in the document store and rake task to check if the data is current.
Added comment
Added specs for additional rake-task related functionality
Add better diffing to rake task
Merge branch 'feature/fault_tolerance' into feature/fault_tolerance_rake_task
Merge branch 'feature/fault_tolerance' into feature/fault_tolerance_rake_task
Merge branch 'feature/fault_tolerance' into feature/fault_tolerance_rake_task
Merge branch 'feature/fault_tolerance' into feature/fault_tolerance_rake_task
Merge branch 'develop' into feature/fault_tolerance_rake_task
Addressed comments - moved stuff around
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Added Rake task to add all external documents to document store
Added external schema data for webmock.
Added spec to test downloading all documents from descriptor document
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merge
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