Adding deleted field to StoredWorkflow 'to_dict' and ability to use deleted as selection field in search
Adding ability to select Histories based on 'deleted' status during search
Merged in kellrott/galaxy-central/search (pull request #318)

Adding deleted field to 'to_dict' and search selection of Workflows
Search API - allow non-admins to search their own workflows.

Just makes sense, but also enables easier functional tests of search.
Add some intial functional testing of search API.

Refactored workflow creation stuff in test_workflows to allow it to be used other places (namely test_search.py). Tests searching for workflows and filtering out deleted workflows.